The Bharatiya Janata Party's (BJP) origins lie in the Bharatiya Jana Sangh, founded by ________
Syama Prasad Mukherjee correct for party system Congress socialist communist swatantra jan sangh as per NCERT party system.
Ref: NCERT Political Science Class XII Chapter 5 Party System explains Congress umbrella one party dominance Rajni Kothari socialist communist swatantra.