যদি তুমি ভালোভাবে পড়াশুনা না করতে, তাহলে ডাক্তার হতে পারতে না। translate

• ক Unless you did not study well, you could not become a doctor.
• খ If you do not study well, you could not become a doctor.
• গ If you do not studied well, you could not become a doctor.
• ঘ Unless you had studied well, you could not have become a doctor. ✅ সঠিক উত্তর