the pairs 1 and 2 are correctly matched.
Vitamin C deficiency causes scurvy, which is a disease characterized by bleeding gums, joint pain, and fatigue.
Vitamin D deficiency causes rickets, which is a disease that affects bone development in children and leads to soft, weak bones.
However, pair 3 is not correctly matched. Vitamin E deficiency does not cause night blindness. Vitamin A deficiency is responsible for causing night blindness.
Therefore, the correct pairing is:
1. Vitamin C : Scurvy
2. Vitamin D : Rickets
3. Vitamin A : Night blindness
Hence, the answer is "1 and 2 only".