Which of the following statements about couplets is NOT true？

Which of the following statements about couplets is NOT true？
A.The two lines in a couplet must have the same number of words.
B.Couplets can be very effective in end-stopped form when the first line asks a question， like a riddle， and the second line gives the answer.
C.Each line can stand alone by itself and make sense.
D.A couplet（）just like a couple（）means two lines.
正确答案：The two lines in a couplet must have the same number of words.