Which of the following vitamins are water soluble?

(A) Thiamine
(B) Riboflavin
(C) Pyridoxine
(D) Ascorbic acid

Choose the correct answer from the options given below:

(A), (B), (C) and (D)

The correct answer is Option (4) → (A), (B), (C) and (D)

Vitamins are classified as:

• Water-soluble → Vitamin B-complex and Vitamin C
• Fat-soluble → Vitamins A, D, E, K

All listed options belong to B-complex or Vitamin C, hence water soluble.

Option-wise Explanation

(A) Thiamine (Vitamin $B_1$)

Belongs to the B-complex group. These vitamins dissolve in water and are not stored in large amounts in the body, so they need regular intake.

(B) Riboflavin (Vitamin $B_2$)

Also a B-complex vitamin. It functions as a coenzyme in energy metabolism and is water soluble, excreted easily in urine.

(C) Pyridoxine (Vitamin $B_6$)

Another B-complex vitamin involved in amino acid metabolism and neurotransmitter synthesis. Like other B vitamins, it is water soluble.

(D) Ascorbic acid (Vitamin C)

Classic example of a water-soluble vitamin. It dissolves readily in water, acts as an antioxidant, and is not stored extensively in the body.