Night blindness is due to the deficiencey of

Options

A. Vit A
B. Vit D
C. Vit C
D. Vit K

Answer

**Step-by-Step Solution:**

1. **Understanding Night Blindness**: Night blindness is a condition where an individual has difficulty seeing in low light or darkness. It is important to identify the underlying cause of this condition.

2. **Identifying the Role of Vitamins**: Among the vitamins listed (Vitamin A, Vitamin D, Vitamin C, and Vitamin K), we need to determine which one is essential for vision, particularly in low light conditions.

3. **Focus on Vitamin A**: Vitamin A is crucial for the health of the retina, specifically for the functioning of photoreceptor cells known as rods. Rods are responsible for vision in dim light.

4. **Rhodopsin and Its Importance**: In the rods, there is a protein called rhodopsin, which is vital for the perception of light. Rhodopsin contains a derivative of Vitamin A and is essential for the conversion of light into electrical signals that the brain can interpret.

5. **Consequences of Vitamin A Deficiency**: If there is a deficiency of Vitamin A, the production of rhodopsin is impaired. This leads to inadequate functioning of the rods, resulting in difficulty seeing in low light conditions, which is characterized as night blindness.

6. **Conclusion**: Therefore, night blindness is primarily due to the deficiency of Vitamin A.

**Final Answer**: Night blindness is due to the deficiency of Vitamin A.

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