The 2 functional groups present in typical carbohydrate are

Question

$\begin {array} {1 1} (A)\; -OH \: and\: -CHO & \quad (B)\; -OH\: and \: -COOH \\ (C)\; -CHO \: and \: -COOH & \quad (D)\; C=O \: and\: -OH \end {array}$