Question: What determines the presence of an Information Element within an Information Element group in NBAP signalling over the UTRAN Iub interface?
Option 1: The presence field of the Information Element itself
Option 2: The repetition indicator of the Information Element group
Option 3: The name of the Information Element group
Option 4: The message type in which the group is embedded
Explanation: Within an Information Element group, each element's presence (whether it is mandatory, optional, or conditional) is defined by its own presence field. This setting specifically dictates whether an Information Element must always be included (mandatory), may be included (optional), or is dependent on another condition being met (conditional), but only if the group itself is present in the message.