The correct answer is (d), Lord Dalhousie.
Lord Dalhousie was the Governor-General of India from 1848 to 1856. During his tenure, he introduced a number of reforms, including the introduction of postal stamps in India. The first Indian postage stamp was issued on 1 January 1854. It was a one-anna stamp depicting the head of Queen Victoria.
The other options are incorrect.
Sir John Shore was the Governor-General of India from 1793 to 1798. He did not introduce postal stamps in India.
Lord Wellesley was the Governor-General of India from 1798 to 1805. He did not introduce postal stamps in India.
Lord Ripon was the Governor-General of India from 1880 to 1884. He did not introduce postal stamps in India.