Which of the following vitamins is soluble in water?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Vitamin B
Vitamins are classified by their solubility in water or fat. Of the four options, only vitamin B (the B group) is water soluble; vitamins E, D and K are fat soluble.
Why the other options are incorrect
Option (1) Vitamin E — Incorrect. It is fat soluble; it is found in vegetable oils such as wheat germ oil and sunflower oil.
Option (2) Vitamin D — Incorrect. It is fat soluble; it is made in the skin in sunlight, and its deficiency causes rickets in children.
Option (4) Vitamin K — Incorrect. It is fat soluble; it is needed for the clotting of blood.
NCERT (2026-27 edition):
Classification of Vitamins
