Match List-I with List-II.

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

Choose the correct answer from the options given below:

To match the vitamins in List-I with their corresponding deficiency diseases in List-II, we examine each vitamin and its biological role:

1. Vitamin B₁₂ (Cobalamin):
Vitamin B₁₂ is essential for red blood cell maturation and neurological function. Its deficiency leads to a reduction in red blood cells because the body cannot absorb enough Vitamin B₁₂, causing Pernicious anaemia.
Thus, A matches with IV.

2. Vitamin D:
Vitamin D is crucial for the absorption of calcium and phosphorus, which are necessary for maintaining strong bones. A deficiency of Vitamin D in children leads to malformed and soft bones, a condition known as Rickets.
Thus, B matches with III.

3. Vitamin B₂ (Riboflavin):
Vitamin B₂ plays a key role in energy metabolism. Its deficiency leads to a condition called ariboflavinosis, which commonly manifests as Cheilosis (cracking and inflammation at the corners of the mouth and lips).
Thus, C matches with I.

4. Vitamin B₆ (Pyridoxine):
Vitamin B₆ is involved in amino acid metabolism and neurotransmitter synthesis. A deficiency in Vitamin B₆ can cause neuromuscular irritability and neurological issues, leading to Convulsions.
Thus, D matches with II.

Combining all these findings, the correct matching sequence is:
A - IV, B - III, C - I, D - II