Question: What is the primary purpose of the Nnef_ApplyPolicy_Create service operation in the 5G System?
Option 1: To request a policy update for a UE based on an AF Identifier and External Identifier or External Group ID.
Option 2: To retrieve a list of available policies for a specific UE.
Option 3: To delete an existing policy applied to a UE.
Option 4: To negotiate a new background data transfer policy.
Explanation: The Nnef_ApplyPolicy_Create service operation is used by the consumer to apply a policy to the UE, as indicated in the description. This involves providing inputs such as AF Identifier and External Identifier or External Group ID, which are essential for identifying the UE and the policy to be applied.