Which of the following plants produce non-motile male garmets ?

Options

A. Ulothrix Marchantia
B. Strobianthus, Chara
C. Spirogyra, Ulothrix
D. Mangifera, Pinus

Answer

To determine which of the following plants produce non-motile male gametes, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Identify the options**: The options given are:
- A) Eulothrix martensii
- B) Strobilanthus
- C) Spirogyra
- D) Mangifera and Pinus

2. **Understand non-motile male gametes**: Non-motile male gametes are those that do not have the ability to move independently. In plants, these are typically represented by pollen grains.

3. **Analyze each option**:
- **Option A: Eulothrix martensii**: This is an algae. In algae, male gametes are usually motile. Therefore, this option does not produce non-motile male gametes.

- **Option B: Strobilanthus**: The male gametes in this plant are represented by pollen grains, which are non-motile. Thus, this option is a candidate for producing non-motile male gametes.

- **Option C: Spirogyra**: This is another type of algae. Similar to Eulothrix, Spirogyra also has motile male gametes. Therefore, this option does not produce non-motile male gametes.

- **Option D: Mangifera and Pinus**:
- **Mangifera (Mango)**: The pollen grains in mango are non-motile.
- **Pinus (Pine)**: In Pinus, the male gametes are also represented by pollen grains, which are non-motile.
Hence, both Mangifera and Pinus produce non-motile male gametes.

4. **Conclusion**: The plants that produce non-motile male gametes are Strobilanthus, Mangifera, and Pinus. However, since the question asks for which of the following plants produce non-motile male gametes, the best answer is option D (Mangifera and Pinus).

### Final Answer:
The plants that produce non-motile male gametes are **Mangifera and Pinus**.