Pits are

Options

A. Depression in primary walls
B. Depressions in secondary walls
C. Both A and B
D. Plasmodesmal connections

Answer

### Step-by-Step Solution:

1. **Understanding the Concept of Pits**:
- Pits are specialized structures found in the cell walls of plant cells. They are crucial for communication and transport between adjacent plant cells.

2. **Identifying the Types of Cell Walls**:
- Plant cells have two types of cell walls: primary and secondary. The primary cell wall is formed first and is relatively thin, while the secondary cell wall is thicker and is formed later, often containing lignin.

3. **Defining Pits**:
- Pits are depressions or thin areas in the cell walls that allow for the passage of materials and communication between adjacent cells.

4. **Analyzing the Options**:
- The options provided are:
- A) Depression in the primary walls
- B) Depression in the secondary walls
- C) Both A and B
- D) Plasmodesmata connections
- Based on the definition of pits, they are primarily associated with the secondary cell walls.

5. **Conclusion**:
- Since pits are specifically associated with the depressions in the secondary walls of plant cells, the correct answer is **B) Depression in the secondary walls**.