Assertion :- Adrenal cortex can be removed without causing death.
Reason:- Adrenal cortex is not vital for survival

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion
B. If both assertion and reason are true but reason is not the correct explanation of assertion
C. If assertion is true but reason is false
D. If both assertion and reason are false.

Answer

To address the question regarding the assertion and reason about the adrenal cortex, we can break down the solution into several steps:

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that the adrenal cortex can be removed without causing death.
- The adrenal cortex is the outer part of the adrenal gland and is responsible for producing several important hormones.

2. **Understanding the Reason**:
- The reason provided is that the adrenal cortex is not vital for survival.
- This implies that the removal of the adrenal cortex would not have significant consequences for life.

3. **Function of the Adrenal Cortex**:
- The adrenal cortex produces hormones such as aldosterone (a mineralocorticoid) and cortisol (a glucocorticoid).
- Aldosterone is crucial for regulating sodium and potassium levels, which helps maintain blood pressure and blood volume.
- Cortisol plays a role in metabolism and the body's response to stress.

4. **Evaluating the Assertion**:
- The assertion that the adrenal cortex can be removed without causing death is incorrect because the hormones produced by the adrenal cortex are essential for various bodily functions, including fluid balance and stress response.

5. **Evaluating the Reason**:
- The reason that the adrenal cortex is not vital for survival is also incorrect. The hormones produced by the adrenal cortex are indeed vital for maintaining homeostasis in the body.

6. **Conclusion**:
- Both the assertion and the reason are false. Therefore, the correct answer to the question is that both the assertion and reason are incorrect.

### Final Answer:
Both the assertion and reason are false.