Which of the following is a complex sentence?
A. Let them do this or they will die.
C. If he helps us, we shall win.
D. Work hard or you cannot prosper in life.
সঠিক উত্তরঃ
C.
If he helps us, we shall win.
Explanation: RD1-229; If, Whether or not, Unless এইগুলো দ্বারা দুটি clause যুক্ত থাকলে সেটি complex sentence হবে।