Rahman ______for his annual exam right now.

A has prepared

B has been preparing

C had been preparing

D is preparing

Correct Answer: Option D

-বাক্যে now, at this moment, right now ইত্যাদি থাকলে বাক্যটি সাধারণত Present Continuous Tense এ হয়।
-সুতরাং সঠিক উত্তর D।