[A]: Root cells have lower OP than leaf cells.
[R]: Root cells have higher solute concentra- tion.

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 analyze the assertion and reason provided in the question, we can break it down into a step-by-step solution.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "Root cells have lower osmotic pressure (OP) than leaf cells."
- Osmotic pressure is the pressure exerted by the water in a solution and is influenced by the concentration of solutes.

2. **Evaluating the Assertion**:
- In general, root cells tend to have a higher concentration of solutes compared to leaf cells because they absorb water and nutrients from the soil.
- Therefore, root cells actually have a higher osmotic pressure than leaf cells, making the assertion **false**.

3. **Understanding the Reason**:
- The reason states that "Root cells have higher solute concentration."
- Higher solute concentration would imply that root cells have a higher osmotic pressure, as osmotic pressure is directly related to solute concentration.

4. **Evaluating the Reason**:
- However, this statement is also misleading. While root cells do have solutes, they are in a state where they are absorbing water, which means they are in a relatively hypo-osmotic condition compared to the surrounding soil solution.
- Therefore, the reason is also **false** because root cells have lower solute concentration compared to the surrounding soil.

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

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

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