Explanation:

- Option 1: R.K. Narayan - A renowned Indian author known for his works set in the fictional town of Malgudi, including "Swami and Friends" and "The Guide."

- Option 2: Khushwant Singh - A famous Indian author and journalist who wrote the novel "Train to Pakistan." This book is a poignant account of the partition of India in 1947.

- Option 3: Vikram Seth - An acclaimed Indian author known for "A Suitable Boy," among other works, but not the author of "Train to Pakistan."

- Option 4: Chetan Bhagat - A contemporary Indian author known for books like "Five Point Someone" that typically deal with modern urban life in India.