কোনটি বাক্যটি শুদ্ধ?

A Why you have done this?

B Why did you have done this?

C Why have you done this?

D Why you had done this?

Correct Answer: Option C

সাধারণ নিয়ম নিম্নরূপ: WH word + have/has + Subject + মূল্য verb এর past participle + extension