A compound gives positive 2, 4-DNP test and positive Tollen's test but cannot reduce Fehling's reagent. The compound is

Aromatic aldehydes give positive 2, 4-DNP and positive Tollen's test. They cannot reduce Fehling's reagent.

(2)   .   .   . can give positive 2, 4- DNP, Tollen's and Fehling's test.

(3)   .   .   . can give positive 2, 4- DNP test only.

(4)    .   .   . cannot give any of these tests.