In the following questions, a sentence has been divided into four parts and marked a, b, c and d. One of these parts contains a mistake in grammar Idiom or syntax. Identify that part and mark it as the answer.

A. Sita claimed that she had

B. not only gone to Delhi

C. but also to Agra

D. and had seen the Taj Mahal

Please do not use chat terms. Example: avoid using "grt" instead of "great".