Answer:
B. K - Lysine.
Step-by-step explanation:
Required
The easiest amino acid to distinguish
The 4 amino acids in the question can be grouped into 2. The groups are:
(1) Group I - Nonpolar amino acids and (2) Group IV - Basic amino acids
Three of the amino acids belong to group I while the last belongs to group IV.
The acids according to their categories are:
(1) Group I - Nonpolar amino acids:- Phenylalanine, Valine and Glycine
(2) Group IV - Basic amino acids:- Lysine
Because Lysine belongs to a different group different from the other three, it will be easily distinguished because it will exhibit a different property from the other three acids.