Assertion : Loss of water produces a negative hydrostatic pressure.
Reason : Positive hydrostatic pressure is developed due to osmotic entry of water into it.

Options

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

Explanation

To solve the assertion and reason question, we will analyze both statements step by step.

### Step 1: Understand the Assertion
**Assertion:** Loss of water produces a negative hydrostatic pressure.

- Hydrostatic pressure refers to the pressure exerted by a fluid at equilibrium due to the force of gravity.
- In biological systems, particularly in plant cells, when water leaves the cell (for example, during transpiration), the pressure inside the cell decreases.
- This decrease in pressure is referred to as negative hydrostatic pressure because the pressure inside the cell becomes lower than the atmospheric pressure.

### Step 2: Understand the Reason
**Reason:** Positive hydrostatic pressure is developed due to osmotic entry of water into it.

- Positive hydrostatic pressure occurs when water enters the cell, causing it to swell.
- This swelling exerts pressure against the cell wall, known as turgor pressure.
- The entry of water is often due to osmotic processes, where water moves from an area of lower solute concentration to an area of higher solute concentration.

### Step 3: Analyze the Relationship Between Assertion and Reason
- Both the assertion and reason are true statements.
- The assertion correctly states that loss of water leads to negative hydrostatic pressure.
- The reason correctly explains that positive hydrostatic pressure is a result of water entering the cell due to osmotic pressure.

### Step 4: Determine if the Reason is the Correct Explanation for the Assertion
- The reason discusses positive hydrostatic pressure, which is a different phenomenon than the negative hydrostatic pressure mentioned in the assertion.
- Therefore, while both statements are true, the reason does not directly explain the assertion.

### Conclusion
- Both the assertion and reason are true, but the reason is not the correct explanation for the assertion.

### Final Answer
- The correct option is that both the assertion and reason are true, but the reason is not the correct explanation of the assertion.

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