Beriberi is a disease caused due to deficiency of ________
- A.vitamin B1
- B.vitamin A
- C.vitamin C
- D.vitamin D
Show answer
Correct answer: A. vitamin B1
Explanation
The correct answer is A, vitamin B1. Beriberi is caused by a lack of thiamine, which is vitamin B1. Thiamine helps the body turn carbohydrates into energy and keeps nerves and the heart working, so its shortage weakens muscles and nerves (dry beriberi) or causes swelling and heart failure (wet beriberi). The disease was common in Asia among people living mainly on polished white rice, because milling strips away the thiamine-rich outer layer of the grain; whole grains, pulses, nuts and eggs supply it. Vitamin B1 is water-soluble, so the body stores little of it and needs a regular intake. B is wrong because vitamin A deficiency causes night blindness and xerophthalmia. C is wrong because vitamin C deficiency causes scurvy, with bleeding gums. D is wrong because vitamin D deficiency causes rickets in children and osteomalacia in adults. Exam tip: B1 beriberi, B3 pellagra, B12 pernicious anaemia, C scurvy, D rickets.