The two functional groups present in a typical carbohydrate are :

A carbohydrate is defined as a polyhydroxy aldehyde or ketone, or a compound that gives these on hydrolysis.

Polyhydroxy means the molecule possesses several hydroxyl ($$-OH$$) groups.
Aldehyde or ketone nature means there is one carbonyl group ($$\gt C = O$$) either at the terminal carbon (aldehyde, $$-CHO$$) or at an internal carbon (ketone).

Therefore every typical carbohydrate necessarily contains:
• a carbonyl group, written generically as $$\gt C = O$$ (it may appear as $$-CHO$$ in aldoses or $$>C = O$$ in ketoses), and
• multiple hydroxyl ($$-OH$$) groups.

Among the given options, Option C lists exactly these two fundamental functional groups:

$$\gt C = O$$ (carbonyl) and $$-OH$$ (hydroxyl)

Hence, the correct choice is:
Option C which is: $$\gt C = O$$ and $$-OH$$