Let's match the deficiencies in List I with the diseases in List II:
(A) Insulin: Insulin is a hormone that regulates blood sugar levels. A deficiency of insulin leads to Diabetes (III).
(B) Protein: Protein deficiency, especially in children, can lead to a condition called Kwashiorkor (I), characterized by edema, irritability, anorexia, and skin changes.
(C) Thyroxin: Thyroxin is a hormone produced by the thyroid gland. Its deficiency can cause Goitre (IV), an enlargement of the thyroid gland.
(D) Vitamin C: Deficiency of Vitamin C (Ascorbic acid) leads to Scurvy (II), a disease characterized by weakness, bleeding gums, and skin hemorrhages.
Therefore, the correct matching is:
A - III
B - I
C - IV
D - II
This corresponds to option (A)