The correct answer is: A. Kangra.
The rulers of Kangra sent soldiers to accompany the British troops in the Revolt of 1857. The rulers of the other hill states, Nurpur, Chamba, and Kullu, did not send soldiers to accompany the British troops.
The Revolt of 1857 was a major uprising against the British East India Company in India. The revolt began in Meerut on May 10, 1857, and spread to other parts of India. The revolt was eventually suppressed by the British, but it had a profound impact on Indian history.
The rulers of Kangra were loyal to the British and supported them during the Revolt of 1857. The rulers of the other hill states were not as loyal to the British and did not support them during the revolt.
The rulers of Kangra were rewarded for their loyalty to the British after the revolt. The British gave the rulers of Kangra more power and authority. The rulers of the other hill states were not rewarded for their loyalty to the British.