[A]: In washed beet root cylinders, betacyanin pigment does not come out when placed in cold water.
[R]: Because cell membrane is impermeable to betacyanin

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

**Step-by-Step Solution:**

1. **Understanding the Question:**
- The question presents two statements:
- [A]: In washed beetroot cylinders, betacyanin pigment does not come out when placed in cold water.
- [R]: Because the cell membrane is impermeable to betacyanin.

2. **Analyzing Statement [A]:**
- The statement claims that when washed beetroot cylinders are placed in cold water, the betacyanin pigment does not leach out. This can be attributed to the nature of the cell membrane.

3. **Understanding Betacyanin:**
- Betacyanin is a pigment responsible for the red color of beetroot. It is located within the vacuoles of the beetroot cells.

4. **Analyzing Statement [R]:**
- The reason provided states that the cell membrane is impermeable to betacyanin. This means that the cell membrane does not allow the pigment to pass through it into the surrounding water.

5. **Connecting [A] and [R]:**
- Since the cell membrane is impermeable to betacyanin, the pigment remains trapped inside the beetroot cells when placed in cold water. Therefore, statement [R] correctly explains statement [A].

6. **Conclusion:**
- Both statements [A] and [R] are true, and [R] is the correct explanation for [A].

**Final Answer:**
- [A] is true, and [R] is true; [R] is the correct explanation of [A].

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