Which of the following gymnosperms has branched stems?

Options

A. Pinus
B. Cycas
C. Cedrus
D. Both a and c

Explanation

To determine which gymnosperms have branched stems, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks which gymnosperms have branched stems. The options provided are Pinus, Cycus, Sidrus, and both A and C.

2. **Define Gymnosperms**: Gymnosperms are a group of plants that produce seeds that are not enclosed in an ovary (naked seeds). They do not produce flowers.

3. **Identify Characteristics of Gymnosperms**: Gymnosperms typically have a main stem that can exhibit different types of branching. The two main types of branching are monopodial (where the main stem continues to grow and branches off) and sympodial (where the main stem stops growing and lateral branches take over).

4. **Examine Each Option**:
- **Pinus**: This is a genus of coniferous trees that exhibit monopodial branching. They can have branched stems.
- **Cycus**: This is a genus of cycad plants. They typically have unbranched stems.
- **Sidrus**: This is another genus of coniferous trees that also exhibit branching.

5. **Conclusion**: Since both Pinus and Sidrus exhibit branched stems, the correct answer is "both A and C".

### Final Answer:
The gymnosperms that have branched stems are **both A (Pinus) and C (Sidrus)**.

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