(A) Carboxylic acids `(R-overset(O)overset(||)C-OH)` have a carbonyl group but it does not give the test of carbonyl group.
Due to resonance double, the bond character of
group is greatly reduced.
A. If both (A) and (R) are correct and (R) is the correct explanation of (A).
B. If both (A) and (R) are correct but (R) is not correct explanation of (A).
C. If (A) is correct but (R) is incorrect.
D. If (A) is incorrect but (R) is correct.