Where was Bharatpur Prajamandal established?

Concept: During the princely-state era, rulers banned political assemblies inside their own territory, so reformers frequently founded Praja Mandal organisations on neutral ground OUTSIDE the state's boundaries, then carried the movement back home. To answer a 'where was it founded' question, look for the place outside the princely state rather than a town within it.

Application: The Bharatpur Praja Mandal was founded in March 1938 at Rewari (in present-day Haryana), under the leadership of Kishanlal Joshi, with associates such as Master Adityendra and Jugal Kishore Chaturvedi. Rewari lay outside Bharatpur State, letting the founders organise free of the Bharatpur ruler's restrictions before taking the work into the state.

Cross-check: It was later registered/renamed as the Bharatpur Praja Parishad (around 1939) and eventually merged into the Matsya Union in 1948 — a chronology that ties the organisation to its 1938 Rewari origin. Hence the founding place is Rewari.