Statement I ; Amino acids exist as Zwitter ions
Statement II ; Amino acids are crystalline solids
Statements I and II are correct
Statement I is correct and statement II is incorrect
Statement I is incorrect and statement II is correct
Statements I and II are incorrect
Amino acids exist as Zwitter ions due to transfer of proton;
H2N-CHR-COOH⇌H3N+-CHR-COO-;
Thus they are crystalline solids soluble in water;