Which of the foll A. Vitamin B₁

B. Vitamin B₂

C. Vitamin B₆

D. Vitamin B₁₂

B group vitamins are water-soluble vitamins. They are readily excreted out of the body and therefore, B group vitamins cannot be stored in our body but our body can store Vitamin B₁₂ because they are insoluble in water. Thus, option (iv) is correct.

Options (i), (ii) and (iii) are incorrect because our body cannot store these vitamins.