Question: In a Telecommunication Network, when utilizing the `CatPerformCardAPDU` function for interacting with a (U)SIM card, what is the expected behavior if both `RAPDULength` and `RAPDU` parameters are set to null?
Option 1: The function will return an error code indicating invalid parameters.
Option 2: The function will perform the APDU command but not wait for a response from the card.
Option 3: The function will execute the PERFORM CARD APDU command, but the response from the card in the indicated reader will not be returned.
Option 4: The function call will result in a timeout, awaiting a response that will never be processed.
Explanation: According to conformance requirements for `CatPerformCardAPDU`, if `RAPDULength` or `RAPDU` is null, the response of the card in the indicated card reader is not returned, even though the command itself is executed. This behavior highlights the importance of properly setting up callback or return parameters to handle responses in telecom network interactions with (U)SIM cards.