Question: What information does the UE NAS layer provide to lower layers regarding NSAG?
Option 1: The most recent NSAG information stored in the UE, allowed NSSAI and partially allowed NSSAI (if any), and zero or more S-NSSAIs related to an access attempt.
Option 2: Only the most recent NSAG information stored in the UE.
Option 3: Only the allowed NSSAI and partially allowed NSSAI (if any).
Option 4: The UE NAS layer does not provide any information regarding NSAG to lower layers.
Explanation: According to the 3GPP specification, the UE NAS layer shall provide the lower layers with the most recent NSAG information stored in the UE, allowed NSSAI and partially allowed NSSAI (if any), and zero or more S-NSSAIs related to an access attempt. This is necessary for network slice-based cell reselection and random access.