The correct answer is (c), Lord Lytton.
The Vernacular Press Act (1878) was an act of the British Parliament that restricted the freedom of the press in India. It was introduced by Lord Lytton, who was the Viceroy of India from 1876 to 1880. The act gave the government the power to censor newspapers and other publications in vernacular languages. It was widely seen as an attempt to suppress Indian nationalism.
Lord Ripon (a) was the Viceroy of India from 1880 to 1884. He was a liberal reformer who introduced a number of reforms, including the Indian Councils Act of 1883, which increased Indian representation in the government.
Lord Dufferin (b) was the Viceroy of India from 1884 to 1888. He was a conservative who was not as interested in reform as Lord Ripon.
Lord Curzon (d) was the Viceroy of India from 1899 to 1905. He was a strong imperialist who was determined to maintain British rule in India. He introduced a number of reforms, but he was also responsible for the partition of Bengal, which was a major cause of the Indian independence movement.