Match the List-I with List-II.

List-I (Name of Vitamin)	List-II (Deficiency disease)
A. Vitamin B12 B. Vitamin D C. Vitamin B2 D. Vitamin B6	I. Cheilosis II. Convulsions III. Rickets IV. Pernicious anaemia

Choose the correct answer from the options given below:

The correct option is A-IV, B-III, C-I, D-II.

To match List-I (Vitamins) with List-II (Deficiency diseases), we analyze the function and deficiency symptoms of each vitamin listed:

A. Vitamin B₁₂ (Cyanocobalamin):
Vitamin B₁₂ is essential for red blood cell maturation and neurological function. Its deficiency leads to a lack of intrinsic factor or poor absorption, resulting in Pernicious anaemia (IV).

B. Vitamin D:
Vitamin D plays a critical role in calcium absorption and bone mineralization. A deficiency in Vitamin D leads to weak and soft bones, causing Rickets (III) in children.

C. Vitamin B₂ (Riboflavin):
Vitamin B₂ is crucial for energy production and cellular function. Deficiency of riboflavin causes Cheilosis (I), which is characterized by inflammatory lesions and cracking at the corners of the mouth.

D. Vitamin B₆ (Pyridoxine):
Vitamin B₆ is involved in amino acid metabolism and neurotransmitter synthesis. A severe deficiency of Vitamin B₆ can lead to neurological issues, including Convulsions (II).

Matching the lists accordingly, we get:
A - IV
B - III
C - I
D - II