Solution:
Solution
Fehling's solution differentiates aldehydes from ketones because it reacts with aldehyde, but not with ketones.
With Fehling's solution (alkaline solution of cupric ion complexed with sodpot. tartate or Rochellie salt or with Benedicts solution), aldehyde gives red ppt. of CuO while ketone gives no ppt.
With the other three options, both aldehyde and ketones react in a similar way.
