Explanation:

- "Dollar Bahu" is a novel written by Sudha Murty. The narrative explores the impact of money on relationships and perceptions within a family, contrasting life in India with that in the United States.

- Kiran Desai is well-known for her novel "The Inheritance of Loss," which won the Man Booker Prize in 2006. Her works often grapple with post-colonial themes and the immigrant experience.

- Arundhati Roy is the author of "The God of Small Things," a Booker Prize-winning novel. Her writing often addresses political and social issues.

- Khushwant Singh was a prominent Indian novelist and journalist, famous for works like "Train to Pakistan," which delves into the Partition of India.

The correct answer is:

Option 3: Sudha Murty