The first conference of Punjab and Hill States Praja Mandal was held at

Chamba
Ludhiana
Sirmaur
Kangra

The correct answer is: B. Ludhiana

The first conference of Punjab and Hill States Praja Mandal was held at Ludhiana on 21 and 22 October 1928. The conference was attended by over 500 delegates from all over Punjab and the princely states of the region. The main objective of the conference was to discuss the political situation in Punjab and the princely states and to form a united front to demand responsible government. The conference was a major success and led to the formation of the Punjab and Hill States Praja Mandal, a political organization that played a major role in the struggle for independence in Punjab.

The other options are incorrect because:

  • Option A: Chamba is a town in the Indian state of Himachal Pradesh. It was not the venue of the first conference of Punjab and Hill States Praja Mandal.
  • Option C: Sirmaur is a district in the Indian state of Himachal Pradesh. It was not the venue of the first conference of Punjab and Hill States Praja Mandal.
  • Option D: Kangra is a district in the Indian state of Himachal Pradesh. It was not the venue of the first conference of Punjab and Hill States Praja Mandal.