পরিশ্রম করলে তুমি পাশ করতে পারতে ।

পরিশ্রম করলে তুমি পাশ করতে পারতে ।

A If you work hard, you would pass.

B If you worked hard, you should pass.

C If you worked hard, you could have passed

D If you had worked hard, you could have passed.

Solution

Correct Answer: Option D