Arginine is an essential amino acid and its one-letter symbol is R. Thus, A matches with II.
Aspartic acid is a non-essential amino acid and its one-letter symbol is D. Thus, B matches with I.
Lysine is an essential amino acid and its one-letter symbol is K. Thus, C matches with IV.
Glutamic acid is a non-essential amino acid and its one-letter symbol is E. Thus, D matches with III.
The correct matching is A-II, B-I, C-IV, D-III.
Answer: A-II, B-I, C-IV, D-III