Read the following statements and choose the correct option. (A) Osmotic pressure is equivalent to the osmotic potential but the sign is opposite. (B) During plasmolysis water is first lost from the vacuole then from the cytoplasm. (C) The process of plasmolysis is usually reversible

Options

A. Only A is correct
B. Only B is incorrect
C. Both B and C are correct
D. Both A and B are correct

Answer

To solve the question, we need to analyze each of the three statements provided and determine their validity.

**Step 1: Analyze Statement A**
- Statement A claims that "Osmotic pressure is equivalent to the osmotic potential but the sign is opposite."
- Osmotic pressure is indeed related to osmotic potential, and it is true that osmotic potential is expressed as a negative value. Therefore, this statement is correct.

**Step 2: Analyze Statement B**
- Statement B states that "During plasmolysis, water is first lost from the vacuole then from the cytoplasm."
- In reality, during plasmolysis, water is lost from the cytoplasm first, followed by the vacuole. Thus, this statement is incorrect.

**Step 3: Analyze Statement C**
- Statement C asserts that "The process of plasmolysis is usually reversible."
- Plasmolysis can be reversible in certain conditions (concave plasmolysis), but it can also be irreversible (convex plasmolysis). Therefore, this statement is also incorrect.

**Conclusion:**
- After analyzing all three statements, we find that only Statement A is correct. Therefore, the correct answer to the question is that only Statement A is true.

**Final Answer:**
- The correct option is A: Only statement A is correct.

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