[A] : Protozoans have no physiological division of labour .
[R] : They have a well developed cell , tissue and tissue organ system .

Options

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

Answer

To solve the assertion and reasoning question provided, we will analyze both the assertion (A) and the reasoning (R) statements step by step.

### Step 1: Analyze the Assertion (A)
The assertion states: "Protozoans have no physiological division of labour."
- **Explanation**: Protozoans are single-celled organisms, which means they do not have specialized cells or tissues. Each protozoan cell performs all necessary functions for survival, such as feeding, digestion, and reproduction. Therefore, the assertion is **false** because it incorrectly implies that protozoans lack any division of labor.

### Step 2: Analyze the Reasoning (R)
The reasoning states: "They have a well-developed cell, tissue, and tissue organ system."
- **Explanation**: Protozoans do not possess a well-developed tissue or organ system. They are unicellular, meaning they consist of a single cell that carries out all life processes. Thus, the reasoning is also **false** because it incorrectly describes the complexity of protozoans.

### Step 3: Conclusion
Both the assertion (A) and the reasoning (R) are false statements. Therefore, the correct answer to the question is that both A and R are false.

### Final Answer
The correct option is: **4. Both A and R are false.**

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