Question: What is a prerequisite for a User Equipment (UE) to indicate support for diffFallbackCombReport-r14, in terms of another capability it must also support?
Option 1: requestReducedFormat-r13
Option 2: supportedMIMOOperation-r12
Option 3: carrierAggregation-r10
Option 4: interRATHandover-r9
Explanation: A UE indicating support for diffFallbackCombReport-r14 must also indicate support for requestReducedFormat-r13, ensuring alignment in reporting capabilities for fallback band combinations when the UE's radio access capabilities differ from those of the requested CA band combination.