A consumer defers a Service Bus message using Defer(). How is the deferred message later retrieved?

1. A It comes back automatically after the lock expires
2. ✓ B It must be retrieved by sequence number using ReceiveDeferred() (correct answer)
3. C It moves to DLQ after deferral
4. D It is available in a separate deferred queue

Shortcut: Deferred messages are retained in the main queue but hidden. They must be explicitly received by sequence number (ReceiveDeferredMessageAsync(sequenceNumber)), which the application must track.