Since /p/ and /b/ are phonetically similar, occur in the same environments and they can distinguish meaning, they are said to be（）.

Since /p/ and /b/ are phonetically similar, occur in the same environments and they can distinguish meaning, they are said to be（）.
A.in phonemic contrast　
B.in complementary distribution
C.the allophones
D.minimal pair
正确答案：in phonemic contrast