Final answer:
Queen Mother Elizabeth's funeral procession did not involve six black horses pulling a gun carriage. The statement is false. The correct answer is b.
Step-by-step explanation:
Queen Mother Elizabeth died at the age of 101, and soldiers of the Royal Horse Artillery did participate in her funeral procession.
However, they did not ride six black horses pulling a gun carriage. Instead, the coffin was carried on a specially-designed gun carriage drawn by a vehicle, not horses. The procession included members of the military, but the horses were not black, and they were not pulling the gun carriage. The statement is false. Hence the correct option is b.