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Q. Fehling's solution can make distinction between:

Redox Reactions

Solution:

a. Fehling''''''''s solution reacts only with aliphatic aldehyde, not with aromatic aldehyde
b. F.S. reacts with $MeCHO$ and also with $\alpha$-hydroxy ketones
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d.F.S. reacts with both aliphatic aldehydes ($MeCHO$ and $HCHO$). So the answer is (a)