Question: What is the primary purpose of the Nsmf_PDUSession_TransferMTData service operation in the 5G System (5GS)?
Option 1: To receive MT Small Data from the V-SMF/I-SMF.
Option 2: To send MT Small Data to the V-SMF/I-SMF after receiving it from the NEF.
Option 3: To establish a new PDU session.
Option 4: To terminate an existing PDU session.
Explanation: The Nsmf_PDUSession_TransferMTData service operation is used by the (H-)SMF to forward MT Small Data received from the NEF to the V-SMF/I-SMF, enabling efficient data transfer in the 5GS network.