Amino acid which lacks chirality is: (A) Lysine, (B) Leucine, (C) Histidine, (D) Glycine
Answer is D. The α-carbon of amino acids has four different groups attached to it and so is a chiral or asymmetric carbon.
The only amino acid which does not have four different groups attached to α-carbon is glycine, i.e. glycine does not have chiral carbon or chirality.