Question: What is a prerequisite for a User Equipment (UE) to support SPS repetition for subframe PUSCH in serving cells other than the SpCell, as indicated by `pusch-SPS-SubframeRepSCell-r15`?
Option 1: Support of dynamic CFI (Control Format Indicator)
Option 2: Support of either `semiStaticCFI-r15` or `semiStaticCFI-Pattern-r15`
Option 3: Capability for transmission mode switch
Option 4: Indication of MIMO (Multiple Input Multiple Output) support
Explanation: For a UE to indicate support for SPS (Semi-Persistent Scheduling) repetition in subframes for PUSCH (Physical Uplink Shared Channel) in serving cells other than the SpCell (`pusch-SPS-SubframeRepSCell-r15`), it must also demonstrate capability for either semi-static CFI (`semiStaticCFI-r15`) or a pattern thereof (`semiStaticCFI-Pattern-r15`). This ensures that the UE can properly manage and interpret control information in a semi-persistent manner, which is crucial for efficient uplink data transmission in multi-cell scenarios.