Question: How does an S1AP entity handle an Abstract Syntax Error due to receiving IEs or IE groups that are defined to be part of a message but are in the wrong order or have too many occurrences?
Option 1: Based on Criticality information and Presence information for the affected IE/IE group.
Option 2: By rejecting the entire procedure and notifying the sender with an error message.
Option 3: By ignoring the erroneous IEs/IE groups and processing the rest of the message based on Criticality information.
Option 4: By requesting retransmission of the entire message from the originator.
Explanation: According to specified handling rules for Abstract Syntax Errors in S1AP, errors due to IEs or IE groups being in the wrong order or having too many occurrences result in rejecting the procedure to maintain protocol integrity.