Which of the Following Compounds Contain(s) a Carboxylic Acid Functional

Question

Which of the following compounds contain(s) a carboxylic acid functional group? 
A) A and B only 
B) A and C only 
C) C only 
D) B only

Accepted Answer

The Answer of Which of the Following Compounds Contain(s) a Carboxylic Acid Functional