The object name for a rule that applies to the entire Incident table is incident .* , which means any field on the incident table. The other options are not valid object names for access control rules.
Reference Access control list rules Access Control List in ServiceNow Access Controls Access control list rules Access Control List in ServiceNow Reference Access control list rules Access Control List in ServiceNow Access Controls

In ServiceNowKnowledge Management, access to knowledge articles is controlled through access settings in theKnowledge Baserecord. The"Can Read"tab is used to specify which users, groups, or roles canview knowledge articlesin a particular Knowledge Base.
#Why "Can Read"?
TheCan Readlist defines theusers, groups, or roles that can access and view articlesin a specific Knowledge Base.
This ensures thatsensitive or restricted knowledge is only available to authorized users.
If no restrictions are set in theCan Readtab, the knowledge base ispublicly accessibleto all users.
#Steps to Configure "Can Read" Permissions:
Navigate toKnowledge Management > Knowledge Bases.
Open a specificKnowledge Base record.
Go to theCan Readtab.
Add the users, groups, or roles that should be able to read the articles.
Save the record.
#Incorrect Options Explained:
A: Access List- No such tab exists in Knowledge Management.
B: Can Access- Incorrect name; the correct tab isCan Read.
C: Accessible to- Does not exist in the Knowledge Base settings.
#Reference:
ServiceNow Knowledge Management User Roles
Managing Knowledge Base Access