Assertion :- Endoplasmic reticulum, golgibody, lysosome and vacuoles are collectively considered as endomembrane system.
Reason:- Because all of these arise from same source that is nuclear envelope.

Options

A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is False
D. If both Assertion & Reason are false.

Answer

To analyze the assertion and reason provided in the question, we will break down the concepts step by step.

### Step 1: Understanding the Assertion
The assertion states that "Endoplasmic reticulum, Golgi body, lysosome, and vacuoles are collectively considered as the endomembrane system."

- **Explanation**: The endomembrane system is indeed a collection of membrane-bound organelles that work together to modify, package, and transport lipids and proteins. The main components of the endomembrane system include the endoplasmic reticulum (ER), Golgi apparatus, lysosomes, and vacuoles.

### Step 2: Understanding the Reason
The reason states that "Because all of these arise from the same source that is the nuclear envelope."

- **Explanation**: This statement is not entirely accurate. While the endoplasmic reticulum is continuous with the nuclear envelope, the Golgi apparatus, lysosomes, and vacuoles do not all arise directly from the nuclear envelope. The Golgi apparatus is formed from the ER, and lysosomes are derived from the Golgi apparatus. Vacuoles can arise from the fusion of vesicles that may come from various sources, not exclusively from the nuclear envelope.

### Step 3: Evaluating the Truth of Assertion and Reason
- **Assertion**: True (the components listed are part of the endomembrane system).
- **Reason**: False (not all components arise from the nuclear envelope).

### Conclusion
Based on the analysis:
- The assertion is true.
- The reason is false.

### Final Answer
The correct option is: "If assertion is true and reason is false."

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