Which of the following compounds will form a zwitterion?

Which among the following $\alpha$-amino acids does $NOT$ have a chiral carbon atom?

The correct match between Item $I$ and Item $II$ is

Item $I$	Item $II$
$A$. Ester test	$P$. Tyr
$B$. Carbylamine test	$Q$. Asp
$C$. Phthalein dye test	$R$. Ser
	$S$. Lys

Which of the following statements is/are true for amino acids?
$(A)$ The solubility of an amino acid in water is maximum at its isoelectric point $(pH)$.
$(B)$ It gives a ninhydrin test.
$(C)$ It releases nitrogen gas upon reaction with nitrous acid $(HNO_2)$.

Which of the following is a basic amino acid?

The correct structure of histidine in a strongly acidic solution $(pH = 2)$ is