1) Which compound can exist in a dipolar(zwitterion) state? A) $C_{6}H_{5}CH_{2}CH(N=CH_{2})COOH$ B) $\left(CH_{3}\right)_{2}CH.CH\left(NH_{2}\right)COOH$ C) $C_{6}H_{5}CONHCH_{2}COOH$ D) $HOOC.CH_{2}CH_{2}COCOOH$ Answer: Option BExplanation:
