Scurvy is caused by the deficiency of Vitamin C, which is chemically known as Ascorbic acid. Thus, A matches with III.
Convulsions are caused by the deficiency of Vitamin B6, which is chemically known as Pyridoxine. Thus, B matches with I.
Cheilosis (fissuring at corners of mouth and lips) is caused by the deficiency of Vitamin B2, which is chemically known as Riboflavin. Thus, C matches with IV.
Xerophthalmia (hardening of cornea of eye) is caused by the deficiency of Vitamin A. Thus, D matches with II.
The correct matching is A-III, B-I, C-IV, D-II.
Answer: A-III, B-I, C-IV, D-II