To answer this question, you need to be familiar with the works of Vikram Seth.
Let's go through each option to understand which book has been written by Vikram Seth:
Option A) My God Died Young - This option is incorrect because it is not a book written by Vikram Seth.
Option B) Look Back in Anger - This option is incorrect because it is not a book written by Vikram Seth.
Option C) A Suitable Boy - This option is correct. A Suitable Boy is a novel written by Vikram Seth. It was published in 1993 and is one of Seth's most famous works.
Option D) Godan - This option is incorrect because it is not a book written by Vikram Seth. Godan is a novel written by Munshi Premchand.
Therefore, the correct answer is option C) A Suitable Boy. This option is correct because it is a book written by Vikram Seth.