The correct answer is: A. Ferguson
Ferguson was a British officer who was assigned by the British for the expedition on Singhbhum in AD 1767. He was a successful commander and was able to capture the fort of Singhbhum. This victory was a major turning point in the British East India Company’s campaign to control the region.
Lt. Rook was a British officer who was also involved in the expedition on Singhbhum. However, he was not the commander of the expedition. He was instead a subordinate officer who was under the command of Ferguson.
Camac was a French officer who was also involved in the expedition on Singhbhum. However, he was not on the side of the British. He was instead on the side of the local rulers who were fighting against the British.
None of the above is not the correct answer because Ferguson was the one who was assigned by the British for the expedition on Singhbhum in AD 1767.