The correct answer is: C. Chamba
Kotgarh was handed over to Chamba state for administration and management purpose in 1846. This was done after the Anglo-Sikh War, in which the British East India Company defeated the Sikh Empire. As part of the peace treaty, the British took control of the Kangra Valley, which included Kotgarh. However, they decided to hand over Kotgarh to Chamba state, as it was more geographically and culturally aligned with that region.
Option A: Kangra is incorrect because Kotgarh was not handed over to Kangra state for administration and management purpose.
Option B: Kullu is incorrect because Kotgarh was not handed over to Kullu state for administration and management purpose.
Option D: Bilaspur is incorrect because Kotgarh was not handed over to Bilaspur state for administration and management purpose.