Complimentary cells are :-

Options

A. Collenchymatous
B. Parenchymatous
C. Sclerenchymatous
D. Meristematic

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about "complementary cells" and their characteristics.

2. **Identifying the Structure**: Complementary cells are associated with the structure of the stem, specifically in the region where the phallogen (cork cambium) is located.

3. **Role of Phallogen**: The phallogen is responsible for producing cork cells and, in this case, it also produces closely arranged parenchyma cells on the outer side instead of cork cells.

4. **Formation of Lenticels**: These parenchymatous cells eventually rupture the epidermis and form lens-shaped openings known as lenticels.

5. **Characteristics of Complementary Cells**: The complementary cells are parenchymatous in nature, which means they are loosely packed cells with many intercellular spaces, allowing for gas exchange.

6. **Exclusion of Other Cell Types**: It is important to note that complementary cells are not collenchymatous, sclerenchymatous, or meristematic. They are permanent cells, which distinguishes them from meristematic cells.

7. **Conclusion**: Therefore, the correct answer to the question is that complementary cells are parenchymatous cells found in the lenticels.

**Final Answer**: Complementary cells are parenchymatous cells.

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