Refer to the given keys and answer the following question.
P. membranes surrounding vacuoles
Q. shelves produced by the folding of inner mitochondrial membrane
R. stacks of membrane bound discs with chlorophyll and carotenoids
S. develops between two adjacent plant cells
Which of the following is not correctly matched?

Options

A. Cristae-Q
B. Middle lamella-S
C. Grana-R
D. Plasmodesmata-P

Explanation

To determine which of the given keys is not correctly matched, we will analyze each option one by one:

1. **P. Membranes surrounding vacuoles**:
- The membrane surrounding vacuoles is known as the **tonoplast**. This is correctly matched.

2. **Q. Shelves produced by the folding of inner mitochondrial membrane**:
- The folds of the inner mitochondrial membrane are called **cristae**. This is also correctly matched.

3. **R. Stacks of membrane-bound discs with chlorophyll and carotenoids**:
- The stacks of membrane-bound discs that contain chlorophyll and carotenoids are known as **grana**. This is correctly matched.

4. **S. Develops between two adjacent plant cells**:
- The structure that develops between two adjacent plant cells is called the **middle lamella**. This is also correctly matched.

Now, let's summarize the matches:
- P is correctly matched as the tonoplast.
- Q is correctly matched as cristae.
- R is correctly matched as grana.
- S is correctly matched as the middle lamella.

Since all options are correctly matched, we need to identify if any of the provided options are incorrectly matched based on the definitions given.

**Conclusion**: All the options P, Q, R, and S are correctly matched. Therefore, there is no option that is incorrectly matched.