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

To solve the problem, we need to evaluate the Assertion (A) and Reason (R) regarding Vitamin D and determine their validity and relationship.

1. Analyzing the Assertion (A):
Assertion (A) states that Vitamin D cannot be stored in our body. Vitamin D is a fat-soluble vitamin, which means it can dissolve in fats and oils and be stored in the body’s fatty tissues and liver. Unlike water-soluble vitamins (e.g., Vitamin C), which are excreted readily in urine, fat-soluble vitamins like Vitamin D can be stored for weeks or months. Therefore, the assertion that Vitamin D cannot be stored is incorrect, as it is well-documented that Vitamin D is stored in the body.

2. Analyzing the Reason (R):
Reason (R) states that Vitamin D is a fat-soluble vitamin and is not excreted from the body in urine. This is correct. As a fat-soluble vitamin, Vitamin D (including forms like D2 and D3) is absorbed with dietary fats and stored in adipose tissue and the liver. It is not readily excreted in urine, unlike water-soluble vitamins, and is instead metabolized in the liver and kidneys, with excess typically stored rather than excreted. Thus, the reason is true.

3. Evaluating the Relationship:
The reason correctly describes Vitamin D as fat-soluble and not excreted in urine, which supports the idea that it can be stored in the body (since lack of excretion contributes to storage). However, the assertion is false because Vitamin D can indeed be stored. In assertion-reason questions, if the assertion is false, the reason’s truth does not make the assertion true. Additionally, the reason does not explain the assertion (which claims non-storage) but rather contradicts it by implying storage capability.

4. Conclusion:
- Assertion (A) is false because Vitamin D can be stored in the body.
- Reason (R) is true because Vitamin D is fat-soluble and not excreted in urine.
- Since the assertion is false, and the reason does not support the incorrect assertion (instead, it supports the opposite), the correct evaluation is that A is false, R is true, and R does not explain A.

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