Explanation
The correct command to verify the CPUSE (Check Point Update Service Engine) version is:

Option B is incorrect because it uses the "[Expert@HostName:0]#" prompt, which is typically used for expert mode commands, but the CPUSE version can be checked using the "show installer status build" command in standard mode.
Option C is incorrect because it uses the "[Expert@HostName:0]#" prompt, and while it includes the "build" parameter, it's not the standard command to check the CPUSE version.
Option D is incorrect because it uses the "HostName:0>" prompt, but it lacks the "show" command and uses
"build" instead of "status build."
References: Check Point Certified Security Expert R81 documentation

Explanation
Security Gateway Clusters in Load Sharing mode are not supported by the Central Deployment feature in R81.20 SmartConsole. According to the Check Point R81.20 Known Limitations article1, Central Deployment in SmartConsole does not support:
Connection from SmartConsole Client to the Management Server through a proxy server. In this case, use the applicable API command ClusterXL in Load Sharing mode VRRP Cluster Installation of a package on a VSX VSLS Cluster that contains more than 3 members.
On Multi-Domain Servers: Global Domain, or the MDS context
Standalone server
Standby Security Management Server or Multi-Domain Security Management
Scalable Platforms 40000 / 60000
SMB Appliances
The other options are supported by the Central Deployment feature in R81.20 SmartConsole. Dedicated Log Server, Dedicated SmartEvent Server, and Security Gateways/Clusters in ClusterXL HA new mode can be selected as targets for installing packages using the Central Deployment wizard.

Explanation
ClusterXL and VRRP are the two cluster solutions that are available under R81.10. According to the ClusterXL R81.10 Administration Guide1, ClusterXL is a Check Point software-based clustering solution that provides high availability and load sharing for Check Point Security Gateways and Cluster Members.
ClusterXL supports two modes: High Availability and Load Sharing. In High Availability mode, all Cluster Members are connected to the same network segment and share a virtual IP address. One member is active and handles all traffic, while the others are in standby mode and ready to take over in case of a failure. In Load Sharing mode, all Cluster Members are active and share the traffic load according to a predefined algorithm. ClusterXL supports both unicast and multicast modes for Load Sharing1.
VRRP (Virtual Router Redundancy Protocol) is an industry standard protocol that provides high availability for routers or firewalls by creating a virtual router with a virtual IP address that is shared by a group of routers or firewalls. One router or firewall is elected as the master and handles all traffic directed to the virtual IP address, while the others are backups that monitor the master and take over if it fails. VRRP can be used with Check Point Security Gateways to provide redundancy and failover for external interfaces1.
NSRP (NetScreen Redundancy Protocol) is a proprietary protocol developed by Juniper Networks that provides high availability and load balancing for NetScreen firewalls. NSRP is not supported by Check Point products2.
HSRP (Hot Standby Router Protocol) is a Cisco proprietary protocol that provides high availability for routers by creating a virtual router with a virtual IP address that is shared by a group of routers. One router is elected as the active router and handles all traffic directed to the virtual IP address, while another router is elected as the standby router and monitors the active router and takes over if it fails. HSRP is not supported by Check Point products.
IP Clustering is a feature of Linux Virtual Server (LVS) that provides high availability and load balancing for IP-based services by creating a cluster of real servers that are accessed through a virtual IP address. The cluster is managed by a director that routes requests to the real servers according to a scheduling algorithm. IP Clustering is not supported by Check Point products.
References: : ClusterXL R81.10 Administration Guide : Check Point R81.10 : Solved: R81.10 - Check Point CheckMates : [Hot Standby Router Protocol - Wikipedia] : [Linux Virtual Server - Wikipedia]

Explanation
The Anti-Virus feature of the Threat Prevention policy blocks traffic from infected websites by matching logs against ThreatCloud information about the reputation of the website. ThreatCloud is a collaborative network that collects and analyzes threat data from millions of sources worldwide. It assigns a reputation score to each website based on its malicious activity and behavior. If a website has a low reputation score, it is considered infected and blocked by the Anti-Virus blade. References: Training & Certification | Check Point Software, CCSE section

UserCheck is a communication tool used to inform a user about a website or application they are trying to access. UserCheck allows administrators to interact with users in real time, informing them of the security policy and the actions they need to take. UserCheck can also enable users to self-remediate incidents or request exceptions from the administrator. Reference: Training & Certification | Check Point Software, Check Point Resource Library