Deficiency disease Pellagra is caused by the deficiency of which of the following?

Niacin

The correct answer is Option (4)- Niacin

Pellagra, a deficiency disease, is caused by the deficiency of Niacin.

Explanation:

• Pellagra is a condition caused by a deficiency of niacin (vitamin B3) in the diet.
• Niacin is essential for various physiological functions in the body, including the metabolism of carbohydrates and fats.
• Symptoms of pellagra include dermatitis (skin inflammation), diarrhea, and dementia.

So, the correct answer is Niacin.