$ The cell membrane helps in pinocytosis and phagocytosis.
! Cell membrane is permeable.

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 the cell membrane's role in pinocytosis and phagocytosis, we will follow these steps:

### Step 1: Analyze the Assertion
- **Assertion**: "The cell membrane helps in pinocytosis and phagocytosis."
- **Explanation**: The cell membrane is indeed involved in both processes. Pinocytosis is the process by which a cell engulfs liquid material, while phagocytosis is the process by which a cell engulfs solid material. Both processes are types of endocytosis, where the cell membrane forms vesicles to bring substances into the cell.

### Step 2: Analyze the Reason
- **Reason**: "Cell membrane is permeable."
- **Explanation**: The cell membrane is not simply permeable; it is actually semi-permeable or selectively permeable. This means that it allows certain molecules to pass while restricting others. The cell membrane is composed of a lipid bilayer that selectively allows substances to enter or exit the cell.

### Step 3: Determine the Correctness of Assertion and Reason
- The assertion is **correct** because the cell membrane does facilitate pinocytosis and phagocytosis.
- The reason is **incorrect** because the cell membrane is not just permeable; it is semi-permeable.

### Step 4: Conclusion
- Since the assertion is correct and the reason is incorrect, the correct answer is that the assertion is true while the reason is false.

### Final Answer
- The correct option is **C**: "If assertion is correct, reason is wrong."

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