Explanation:

- "The English Teacher" is a novel written by R.K. Narayan.

- Option 1: R.K. Narayan - Correct. R.K. Narayan is the renowned Indian author who wrote "The English Teacher" as part of his series about the fictional town of Malgudi.

- Option 2: Salman Rushdie - Incorrect. He is an acclaimed author known for books like "Midnight's Children" and "The Satanic Verses."

- Option 3: Khushwant Singh - Incorrect. He is known for works like "Train to Pakistan."

- Option 4: Vikram Seth - Incorrect. He is best known for "A Suitable Boy."