question_answer

For \[\alpha -\]amino acids having the structure                 \[R-\underset{N{{H}_{2}}\,\,}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,}{\mathop{CH-}}\,}}\,C{{O}_{2}}H\]                 Which of the following statements are true                                 Water solubility is maximum at a pH when concentrations of anions and cations are equal                                 They give ninhydrin test                                               On reacting with nitrous acid give off \[{{N}_{2}}\] [MP PET 1994]

A)                 All          

B)                 B and C

C)                 A and B

D)                 A