In many constituencies, the 76 sub-castes among the most backward castes (MBC) which constitutes 51% of UP’s population play a key role in determining an election result. The emergence of regional parties representing particular castes, and quota have empowered dominant castes among MBCs. However, lower castes are still deprived of the benefits of reservation.

from Times of India https://timesofindia.indiatimes.com/elections/lok-sabha-elections-2019/uttar-pradesh/news/why-parties-are-wooing-ups-most-backward-sub-castes/articleshow/69122754.cms