He said , "I went to Tangail ''(indirect)

A He said that had he gone to Tangail .

B He said that I had gone to Tangail

C He said that he had gone to Tangail

D He said that he went to Tangail

Correct Answer: Option C

Indirect - Subject+said+that+ past perfect(sub+had+past participle form+...)
He said that he had gone to Tangail