Question

Which one of the following diseases is caused by the deficiency of niacin:

• A. Anemia
• B. Night Blindness
• C. Pellagra
• D. Scurvy

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
The question asks which disease develops when the body does not get enough niacin (vitamin B3).

Step 2: Key Concept or Approach:
Each vitamin deficiency produces its own recognizable set of symptoms, so the task is to match niacin to the disease it causes, not the disease caused by some other vitamin.

Step 3: Detailed Explanation:
Anemia usually points to low iron, B12, or folate, not niacin.
Night blindness points to low vitamin A, since that vitamin is needed for the eye's light-sensing pigment.
Scurvy points to low vitamin C, seen as bleeding gums and slow-healing wounds.
Niacin deficiency instead causes pellagra, which classically presents with dermatitis on sun-exposed skin, diarrhea, and dementia, sometimes remembered as the three D's.

Step 4: Final Answer:
Pellagra is the disease caused by niacin deficiency.