Which of the following plant form seed and have pollen tube ?

Options

A. Angiosperm
B. Pteridophytes
C. Gymnosperm
D. Siphonogamous plants

Answer

To solve the question "Which of the following plant forms seed and have pollen tube?", we need to analyze the options provided and understand the characteristics of each group of plants.

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for plants that both form seeds and have a pollen tube.

2. **Identify the Options**: The options given are:
- A) Angiosperms
- B) Pteridophytes
- C) Gymnosperms
- D) Siphonogams

3. **Analyze Each Option**:
- **Option A: Angiosperms**: Angiosperms are flowering plants that produce seeds enclosed within a fruit. They also produce pollen tubes during fertilization. Therefore, this option satisfies both criteria.

- **Option B: Pteridophytes**: Pteridophytes (like ferns) do not produce seeds; they reproduce via spores. Thus, this option does not meet the criteria.

- **Option C: Gymnosperms**: Gymnosperms are non-flowering plants that produce seeds, but they also have pollen tubes for fertilization. This option meets both criteria as well.

- **Option D: Siphonogams**: Siphonogams refer to plants that have pollen tubes, which includes both angiosperms and gymnosperms. This option also meets the criteria of having seeds and pollen tubes.

4. **Determine the Correct Answer**:
- Since both Angiosperms (Option A) and Gymnosperms (Option C) form seeds and have pollen tubes, and Siphonogams (Option D) encompasses both groups, the most inclusive and correct answer is **Option D: Siphonogams**.

### Final Answer:
**Option D: Siphonogams** is the correct answer as it includes both Angiosperms and Gymnosperms, which form seeds and have pollen tubes.