The correct answer is (b), Ishwar Chandra Vidyasagar.
Ishwar Chandra Vidyasagar was a Bengali polymath who was a key figure of the Bengal Renaissance. He is considered one of the greatest Bengalis of all time. He was a pioneer of women’s rights and education in India. He is best known for his efforts to legalize widow remarriage and for his work on Bengali grammar and literature.
Annie Besant was an Irish social reformer, theosophist, writer, and educationist. She was one of the most influential women of her time. She was a pioneer in the fields of education and women’s rights. She was also a strong advocate for Indian independence.
M.G. Ranade was an Indian economist, social reformer, and politician. He was one of the founders of the Indian National Congress. He is best known for his work on economic development and social reform.
Raja Ram Mohan Roy was an Indian social reformer, writer, and philosopher. He is considered the father of modern India. He is best known for his efforts to reform Hinduism and for his work on education and women’s rights.
Ishwar Chandra Vidyasagar was the most prominent figure in the fight for widow remarriage in India. He was a strong advocate for women’s rights and education. He worked tirelessly to change the social and legal status of widows in India. He was successful in getting widow remarriage legalized in 1856. This was a major victory for women’s rights in India.