According to the Citrix documentation, the -denySSLReneg parameter specifies the type of SSL renegotiation that the Citrix ADC denies. The possible options are:
NONSECURE: Deny renegotiation requests from a client if the initial handshake between the Citrix ADC and the client is not secure. A secure handshake is one in which both parties prove their identities to each other by presenting valid certificates.
FRONTEND_CLIENT: Deny renegotiation requests from a client on a front-end SSL connection, regardless of whether the initial handshake is secure or not. A front-end SSL connection is one in which the Citrix ADC communicates with the client over SSL.
ALL: Deny all renegotiation requests from a client on a front-end SSL connection and from a server on a back-end SSL connection. A back-end SSL connection is one in which the Citrix ADC communicates with the server over SSL.
NO: Allow all renegotiation requests.
Therefore, the correct answer is A and C.

When EDT is disabled, ICA fallback communication occurs over TCP rather than UDP.
Remote users connecting through NetScaler Gateway reach internal Citrix resources using ICA over SSL.
Citrix documentation specifies that NetScaler Gateway communicates with clients using:
* TLS/SSL over port 443, regardless of whether EDT is enabled or not.
This port must be opened on the perimeter firewall to allow:
* Secure ICA proxy traffic
* Authentication traffic
* Connection establishment
* STA ticket validation via Gateway
Why the other options are incorrect:
* 1494 - Raw ICA (not used externally when Gateway is in front).
* 2598 - Session Reliability port; also not used by external clients connecting via Gateway.
* 80 - Unencrypted HTTP (never appropriate for secure remote access).
NetScaler Gateway always requires SSL 443 for secure ICA proxy connections.
Documentation References
* Citrix Gateway Deployment Guide # Ports and Protocols
* ICA/HDX Network Port Requirements
* Citrix Virtual Apps and Desktops # EDT and Fallback Behavior

According to the Citrix documentation1, HA monitoring should be enabled only on interfaces that are UP on both nodes. If HA monitoring is enabled on a disabled interface of the primary node, the secondary node will not be able to receive heartbeats from the primary node and will not initiate a failover.

In Citrix Virtual Apps and Desktops, administrators can use tag restrictions to specify which machines within a Delivery Group are affected by certain power management actions. By applying tags to a subset of machines, the administrator can ensure that only those tagged machines are restarted daily during non-peak hours, while the rest follow the weekly restart schedule.

According to the Citrix documentation, the command bind cs vserver MYVPN_http -lbvserver Vserver-CS-1 binds a load balancing virtual server to a content switching virtual server. This means that the content switching virtual server will forward the requests that match its policies to the load balancing virtual server. In this case, the content switching virtual server MYVPN_http has a policy that matches requests for http://server.citrix.
lab, so it will forward those requests to the load balancing virtual server Vserver-CS-1. Therefore, the users trying to access http://server.citrix.lab will be connected to the Vserver MYVPN_http, which will then connect them to Vserver-CS-1.