$ Soil solutIon is absorbed by all the parts of a root .
! Soil solution is always of a high concentration.

Options

A. If both As and R are correct and R is correct explanation of As
B. If both As and R are correct but R is not correct explanation of As
C. If As is correct, R is wrong
D. If both As and R are wrong.

Answer

To solve the assertion and reason question regarding soil solution absorption by roots, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "soil solution is absorbed by all the parts of a root."
- This statement needs to be evaluated for its truthfulness.

2. **Evaluating the Assertion**:
- Soil solution refers to the mixture of water, organic matter, and minerals present in the soil.
- In reality, soil solution is primarily absorbed by the root hairs, which are specialized structures on the roots.
- Therefore, the assertion is **incorrect** because it implies that all parts of the root absorb soil solution, which is not true.

3. **Understanding the Reason**:
- The reason states that "soil solution is always of a high concentration."
- This statement also needs to be evaluated for its accuracy.

4. **Evaluating the Reason**:
- The concentration of soil solution can vary based on several factors, including the amount of water present in the soil and climatic conditions.
- For instance, during dry seasons, the concentration of soil solution may be higher due to reduced water content, while during wet seasons, it may be lower.
- Thus, the reason is also **incorrect** because it claims that soil solution is always of high concentration, which is not true.

5. **Conclusion**:
- Since both the assertion and the reason are incorrect, we can conclude that the correct answer to the question is option D: "If both assertion and reason are wrong."

### Final Answer:
The correct option is D: Both assertion and reason are wrong.

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