The correct answer is B.P. Mandal.
B.P. Mandal was a politician and social reformer who played a major role in the Backward Classes Movement in Bihar. He was born in 1918 in a village in Bihar. He studied law and became a member of the Indian National Congress. He was elected to the Lok Sabha in 1957 and served as a minister in the government of Indira Gandhi. He was also the chairman of the Mandal Commission, which was set up to investigate the social, educational, and economic conditions of the backward classes in India. The Mandal Commission report, which was submitted in 1980, recommended that 27% of government jobs and seats in educational institutions be reserved for the backward classes. This recommendation led to a lot of controversy, but it was eventually implemented by the government of V.P. Singh.
Karpoori Thakur was a politician and social reformer who also played a major role in the Backward Classes Movement in Bihar. He was born in 1924 in a village in Bihar. He studied law and became a member of the Janata Party. He was elected to the Lok Sabha in 1977 and served as the chief minister of Bihar from 1977 to 1979. He was a strong advocate for the rights of the backward classes and played a major role in the implementation of the Mandal Commission report.
Ram Manohar Lohia was a politician and social reformer who was also a major figure in the Backward Classes Movement in Bihar. He was born in 1910 in a village in Uttar Pradesh. He studied law and became a member of the Congress Socialist Party. He was a strong advocate for the rights of the poor and the oppressed, and he played a major role in the movement for social justice in India.
Lalu Prasad Yadav is a politician who has served as the chief minister of Bihar from 1990 to 1997 and from 2005 to 2010. He is the leader of the Rashtriya Janata Dal (RJD) party. He is a controversial figure, but he is also a popular leader among the poor and the marginalized. He has been accused of corruption and nepotism, but he has also been credited with bringing development to Bihar.
In conclusion, the leader of the ‘Backward Classes Movement’ in Bihar was B.P. Mandal. He was a politician and social reformer who played a major role in the movement for social justice in India.