Question: In an IMS (IP Multimedia Subsystem) session, what information may be included in charging records based on local configuration regarding the user plane connection's path?
Option 1: Only the type of User Equipment (UE) used for the session.
Option 2: Whether a transcoder is inserted by the IMS-ALG and the UE's location.
Option 3: Whether the user plane connection traverses an IP realm different from its default IP realm on either leg of the session.
Option 4: The duration of the session and the amount of data transferred.
Explanation: This option is correct because, according to the provided context, charging records may include information on whether the user plane connection (on either the incoming or outgoing leg of the IMS session) traverses an IP realm different from its default IP realm, but only if required by local configuration. This detail is crucial for accurate billing and charging purposes in telecom networks, especially when sessions involve multiple IP realms which might incur different charges.