By default, which action is assigned to the intrazone-default rule?

Reset-client is an action that resets the client-side connection but is not the default action for intrazone traffic.

Reset-server is an action that resets the server-side connection but is not the default action for intrazone traffic.

Deny is the default action for the interzone-default rule (traffic between zones), not the intrazone-default rule.

The intrazone-default rule is a predefined security policy rule that permits all traffic flow between interfaces or subinterfaces residing in the same security zone. This default Allow action ensures that internal traffic within a zone is not blocked without explicit policy configuration.