Assertion: Some orgainsms can maintain internal homeostasis by means of physiological processes and are called "regulates."
Reason: Regulates can maintain internal homeostasis only up to a lilmit under stressful conditions.

Options

A. If both Assertion and Reason are true and the reason is correct explanation of the assertion, then mark (1).
B. If both Assertion and Reason are true but the reason are true the reason is not the correct explanation of the assertion, then mark (2).
C. If Assertion is true but Reason is false, then mark (3).
D. If both Assertion and Reason are false, then mark (4).

Answer

To analyze the assertion and reason provided in the question, we can break it down into steps:

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that some organisms can maintain internal homeostasis through physiological processes and are referred to as "regulators."
- This is true. Regulators, such as mammals and birds, have mechanisms that allow them to maintain a stable internal environment despite external changes.

2. **Understanding the Reason**:
- The reason states that regulators can maintain internal homeostasis only up to a limit under stressful conditions.
- This statement is misleading. While it is true that there are limits to how much regulators can cope with stress (e.g., extreme temperatures, dehydration), they are still capable of maintaining homeostasis in a wider range of conditions compared to conformers.

3. **Evaluating the Relationship**:
- The assertion is correct, as it accurately describes regulators.
- The reason, however, is incorrect because it implies that regulators cannot maintain homeostasis under significant stress, which is not entirely accurate. They can maintain homeostasis but may struggle beyond certain thresholds.

4. **Conclusion**:
- Since the assertion is correct and the reason is incorrect, the overall conclusion is that the assertion stands true while the reason does not support it.

### Final Answer:
- The assertion is correct, but the reason is incorrect.