Question: Which of the following is NOT a type of downlink physical channel in NR (New Radio) as per standards, where information originates from higher layers?
Option 1: Physical Uplink Shared Channel (PUSCH)
Option 2: Physical Downlink Shared Channel (PDSCH)
Option 3: Physical Multicast Channel (PMC)
Option 4: Physical Broadcast Channel (PBCH)
Explanation: According to the context, defined downlink physical channels in NR include PDSCH and PBCH. PMC is not among these listed downlink channels, making it the correct answer as a non-existent downlink channel in the provided context.