Question

Assertion (A): Vitamin D cannot be stored in our body. 
Reason (R): Vitamin D is fat-soluble vitamin and is not excreted from the body in urine.

• A. Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
• B. Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
• C. Assertion (A) is false, but Reason (R) is true.
• D. Assertion (A) is true, but Reason (R) is false.

Hint:

Remember that fat-soluble vitamins like Vitamin D, A, E, and K are stored in the liver and fatty tissues, whereas water-soluble vitamins are not stored and are excreted in urine.

Answer 1

The Correct Option is C

This analysis evaluates the provided Assertion (A) and Reason (R) concerning Vitamin D.

1. Assertion (A) Analysis:
Assertion (A) claims Vitamin D cannot be stored by the body. Vitamin D is a fat-soluble vitamin. This means it dissolves in fats and oils and can be retained in the body's fatty tissues and liver. Unlike water-soluble vitamins (e.g., Vitamin C), which are quickly eliminated via urine, fat-soluble vitamins like Vitamin D can be stored for extended periods, weeks or months. Consequently, the assertion that Vitamin D is not storable is inaccurate, as evidence confirms Vitamin D is stored in the body.

2. Reason (R) Analysis:
Reason (R) correctly states that Vitamin D is a fat-soluble vitamin and is not excreted in urine. As a fat-soluble vitamin, Vitamin D (including D2 and D3) is absorbed with dietary fats and stored in adipose tissue and the liver. It is not readily excreted in urine, differing from water-soluble vitamins. Instead, it undergoes metabolism in the liver and kidneys, with excess typically stored rather than excreted. Therefore, the reason is factual.

3. Relationship Evaluation:
The reason accurately identifies Vitamin D as fat-soluble and not excreted via urine, which implies its capacity for storage. However, the assertion is false because Vitamin D is, in fact, storable. In assertion-reason scenarios, a false assertion remains false regardless of the truthfulness of the reason. Furthermore, the reason contradicts the assertion by implying storage capability, rather than explaining the assertion's claim of non-storage.

4. Conclusion:
- Assertion (A) is false; Vitamin D is storable in the body.
- Reason (R) is true; Vitamin D is fat-soluble and not excreted in urine.
- Given that the assertion is false and the reason contradicts it rather than supporting it, the correct assessment is: Assertion (A) is false, Reason (R) is true, and Reason (R) does not explain Assertion (A).

Final Answer:
Assertion (A) is false, and Reason (R) is true.