Question

Which one of the following is a water-soluble vitamin that is not excreted easily?

• A. Vitamin B₂
• B. Vitamin B₁
• C. Vitamin B₆
• D. Vitamin B₁₂

Hint:

Vitamin Bsubscript{12} is unique among water-soluble vitamins as it is stored in the body for a long time.

Answer 1

The Correct Option is D

Step 1: Water-Soluble Vitamin Properties
Water-soluble vitamins, including B-complex and C, disperse in water and are eliminated via urine.
Vitamin B₁₂ deviates from this general rule. 
Step 2: Vitamin B₁₂ Retention 
Distinct from other B vitamins, B₁₂ is retained in the liver.
It is crucial for producing red blood cells and maintaining nervous system functions.
Final Answer: Vitamin B₁₂ is water-soluble, yet its excretion is not rapid.