Vitamin B1 is also known as
- (a)Riboflavin
- (b)Thiamin
- (c)Retinol
- (d)Tocopherol
Correct — B, Thiamin. Vitamin B1 is chemically thiamine (thiamin), a water-soluble B-complex vitamin needed for carbohydrate metabolism and healthy nerve function. Its deficiency causes beriberi, a disease affecting the nervous and cardiovascular systems. The other names in the options belong to different vitamins.
- (a)Riboflavin — Riboflavin is Vitamin B2, not B1; its deficiency causes cracks at the corners of the mouth (cheilosis) and inflammation of the tongue.
- (c)Retinol — Retinol is Vitamin A, a fat-soluble vitamin associated with vision; it is unrelated to Vitamin B1.
- (d)Tocopherol — Tocopherol is Vitamin E, a fat-soluble antioxidant vitamin, not the B1 vitamin.
The B-complex vitamins are water-soluble and each has a distinct chemical name — B1 thiamine, B2 riboflavin, B3 niacin, B6 pyridoxine, B12 cobalamin. Thiamine (B1) is required for carbohydrate metabolism and nerve conduction, and its lack causes beriberi.
The question is a straight recall of the chemical name of Vitamin B1. Fix the B-series names (thiamine = B1, riboflavin = B2) and eliminate the intruders, which belong to Vitamin A (retinol) and Vitamin E (tocopherol).
- Vitamin B1 is thiamine; its deficiency causes beriberi.
- Vitamin B2 is riboflavin; Vitamin B3 is niacin; Vitamin B12 is cobalamin.
- Vitamin A is retinol (deficiency causes night blindness); Vitamin E is tocopherol.
- B-complex vitamins and Vitamin C are water-soluble; Vitamins A, D, E and K are fat-soluble.
Vitamin B1 = thiamine (b); riboflavin, retinol and tocopherol are B2, A and E respectively.
- Mixing up thiamine (B1) with riboflavin (B2) — both are B-vitamins.
- Assuming a 'B1' answer must itself start with 'B'; the chemical name thiamine does not.
Asked as vitamin-to-chemical-name or vitamin-to-deficiency-disease matching.
Consider the following statements: 1. Non-function of lachrymal gland is an important symptom of deficiency of Vitamin A. 2. Deficiency of Vitamin B1 can lead to indigestion and heart enlargement. 3. Vitamin C deficiency can lead to pain in the muscles. 4. Deficiency of Vitamin D causes increased loss of Ca++ in urine. Which of these statements given above are correct?
- (a) 1 and 2
- (b) 2, 3 and 4
- (c) 1, 3 and 4
- (d) 1, 2, 3 and 4
Answer(a) 1 and 2
Same concept — vitamins and their deficiency effects. That UPSC item hinges on thiamine (Vitamin B1) causing cardiac enlargement (wet beriberi), reinforcing the identity of Vitamin B1 tested here.
Which one among the following diseases is caused due to deficiency of Vitamin D in humans?
- (a) Beriberi
- (b) Scurvy
- (c) Rickets
- (d) Pneumonia
Answer(c) Rickets
Same concept — vitamins and their deficiency diseases. That NDA item tests Vitamin D (rickets); this one tests the identity of Vitamin B1 (thiamine, deficiency beriberi), completing the vitamin-name/deficiency set.
- practice — not a real PYQ
Deficiency of Vitamin B1 (thiamine) causes which disease?
- (a)Scurvy
- (b)Beriberi
- (c)Rickets
- (d)Night blindness
Answer(b) Beriberi — the classic thiamine-deficiency disease.
- practice — not a real PYQ
Which vitamin is chemically known as riboflavin?
- (a)Vitamin B1
- (b)Vitamin B2
- (c)Vitamin C
- (d)Vitamin K
Answer(b) Vitamin B2 — riboflavin.