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a
A-IV; B-III; C-II; D-I
b
A-III; B-I; C-II; D-IV
c
A-IV; B-II; C-I; D-III
d
A-IV; B-III; C-I; D-II
answer is A.
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Detailed Solution
Phenyl alanine has aromatic ring attached to alanine, Valine has one carboxylic group and one amino group, Aspartic acid has two carboxylic groups and one amino group and Lysine has two amino groups and one carboxylic group.