Stem is culm in

Options

A. Bamboo
B. Grass
C. Both A and B
D. Sunflower.

Answer

To solve the question "Stem is culm in," we need to identify which plants have a stem structure referred to as "culm."

### Step-by-Step Solution:

1. **Understanding the Term "Culm":**
- The term "culm" refers to the stem of certain plants, particularly those in the Poaceae family, which includes grasses and bamboo.

2. **Identifying the Plants:**
- The question provides options: bamboo, grass, both A and B, and sunflower.
- We need to determine which of these plants possess a culm.

3. **Analyzing Each Option:**
- **Bamboo:**
- Bamboo is known for its strong, erect, and hollow stem structure, which is classified as a culm.
- **Grass:**
- Similar to bamboo, grass also has a culm, characterized by its hollow stem and nodes.
- **Sunflower:**
- Sunflower does not have a culm; it has a different type of stem that is solid and not hollow.

4. **Conclusion:**
- Since both bamboo and grass have stems that are classified as culms, the correct answer to the question is "both A and B."

### Final Answer:
The stem is culm in **both A (bamboo) and B (grass)**.

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