The correct answer is (a) Lord William Cavendish Bentinck.
Lord William Cavendish Bentinck was the Governor-General of India from 1828 to 1835. He was a strong advocate of English education in India, and he introduced a number of reforms to promote it. In 1835, he passed the English Education Act, which made English the medium of instruction in government schools. He also established a number of English schools and colleges, including the Hindu College in Calcutta and the Presidency College in Madras.
Lord Hardinge was the Governor-General of India from 1844 to 1848. He was not as interested in English education as Lord Bentinck, and he did not make any major changes to the education system.
Lord Minto was the Governor-General of India from 1858 to 1869. He was also not as interested in English education as Lord Bentinck, but he did make some minor changes to the education system.
Lord Dalhousie was the Governor-General of India from 1848 to 1856. He was not interested in English education, and he actually made some changes that made it more difficult for Indians to get an English education.