The Question is from neet-botany mineral-nutrition , and it was created by the author D VINOD

Question

The deficiency of which vitamin causes night blindness?

D VINOD · Accepted Answer

## CORE INFORMATION
✓ **Answer**: B
## CONCEPT FRAMEWORK
 **Primary Concept**: Vitamin deficiencies and their effects on the body.
 **Related Topics**: Nutrition, ophthalmology, biochemistry.
 **Prerequisites**: Basic understanding of vitamins and their roles in the body.
## SOLUTION PATHWAY
**Given Information**:
  The question asks about the vitamin deficiency causing night blindness.
**Method & Steps**:
 1. Identify the vitamin responsible for maintaining good vision, particularly night vision.
  Reasoning: Night blindness is a condition characterized by difficulty seeing in low-light conditions. This is linked to a deficiency in a vitamin crucial for the formation of rhodopsin, a pigment in the retina essential for vision in dim light.
  Formula/Rule:  None directly applicable.
 2. Recall the function of Vitamin A.
  Working: Vitamin A plays a vital role in maintaining good vision, especially in low-light conditions. It is a precursor to rhodopsin, a light-sensitive pigment in the retina's rods.  A deficiency in Vitamin A leads to a reduced ability to see in dim light, resulting in night blindness.
  Key Point:  Other vitamins have important roles in the body but are not directly linked to night blindness.
 3. Conclude which vitamin deficiency causes night blindness.
  Result: Vitamin A deficiency causes night blindness.
  Verification: This is a well-established fact in nutrition and ophthalmology.
 ## OPTION ANALYSIS
A :x: Vitamin D is crucial for calcium absorption and bone health. Its deficiency leads to rickets and osteomalacia, not night blindness.
B ✓: Vitamin A is essential for vision, particularly night vision. Its deficiency causes night blindness.
C :x: Vitamin C is an antioxidant and plays a vital role in immune function and collagen synthesis.  Scurvy results from its deficiency, not night blindness.
D :x: Vitamin K is essential for blood clotting. Deficiency leads to bleeding disorders, not night blindness.
 ## LEARNING AIDS
 **Common Mistakes**: 
  1.Confusing Vitamin A with other fat-soluble vitamins (D, E, K) and their associated deficiency symptoms:  Focus on the specific role of Vitamin A in rhodopsin synthesis.
  2.Associating night blindness with general vision problems: Night blindness is specifically related to low-light vision.
 **Quick Tips**:
  1.Remember that Vitamin A is crucial for vision, particularly night vision (hence, 'A' for vision).
  2.Associate Vitamin A with rhodopsin, the pigment responsible for vision in dim light.

D VINOD · Answer

Vitamin D

D VINOD · Answer

The correct Option is "Vitamin A"

D VINOD · Answer

Vitamin C

D VINOD · Answer

Vitamin K

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