Which political leader left the Congress party and founded the Bharatiya Kranti Dal in 1967?

Chaudhary Charan Singh

The correct answer is Option (4) → Chaudhary Charan Singh

Chaudhary Charan Singh (1902-1987): Prime Minister of India between July1979 - January 1980; freedom fighter; active in the politics of Uttar Pradesh; proponent of rural and agricultural development; left Congress party and founded Bharatiya Kranti Dal in 1967; twice Chief Minister of U.P.; later he was one of the founders of the Janata Party in 1977 and became Deputy Prime Minister and Home Minister (1977-79); founder of Lok Dal.