Question

Carbohydrates may be defined chemically as :
a. Aldehyde or Ketone derivatives of the polyhydric alcohols
b. Compounds which yield as are derivatives on Hydrolysis
c. Both a &b
d. None of these​

Answer 1

Optically active polyhydroxy aldehydes or ketones or complex substances which on hydrolysis yield polyhydroxy aldehyde or polyhydroxy ketone are called carbohydrates. Carbohydrates are one of the fundamental classes of macromolecules found in biology.

So your answer will be c. both a and b.