complementry cells occur in

Options

A. pericycle
B. pith
C. lenticels
D. endodermis

Answer

**Step-by-Step Solution:**

1. **Understanding Complementary Cells**: Complementary cells are a type of plant cell that are associated with specific structures in plants. They play a role in the process of gaseous exchange.

2. **Identifying the Options**: The question provides four options:
- A) Pericycle
- B) Spith
- C) Lenticels
- D) Endodermis

3. **Analyzing Each Option**:
- **Pericycle**: This is a layer of cells found in roots, but it does not contain complementary cells.
- **Spith**: This term seems to be a typographical error or a misnomer; it does not refer to any specific plant structure related to complementary cells.
- **Lenticels**: These are small openings on the surface of stems and branches that facilitate gas exchange. They are formed from cork cambium and contain complementary cells.
- **Endodermis**: This is the innermost layer of the cortex in roots, which regulates the flow of water and nutrients but does not contain complementary cells.

4. **Conclusion**: Based on the analysis, the correct answer is **C) Lenticels**, as complementary cells occur in the interior of lenticels which are involved in gaseous exchange.

5. **Final Answer**: Complementary cells occur in **lenticels**.

---