Flagellated male gametes are present in all the three of which one of the following sets

Options

A. Zygnema, Saprolegnia, and Hydrilla
B. Fucus, Marsilea, and Calotropis
C. Riccia, Dryopteris, and Cycas
D. Anthoceros, Funaria, and Spirogyra

Answer

To solve the question regarding which set of plants contains flagellated male gametes, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: We need to identify which set of plants has flagellated male gametes. Flagellated male gametes are typically found in certain groups of algae and some bryophytes and pteridophytes.

2. **Analyze Each Option**:
- **Option 1: Zygmema, Saprolagina, and Hydrilla**:
- Zygmema does not have flagellated male gametes; it reproduces through conjugation.
- Saprolagina has flagellated male gametes.
- Hydrilla has flagellated male gametes.
- Since Zygmema does not have flagellated male gametes, this option is eliminated.

- **Option 2: Fucus, Marcellia, and Callotropis**:
- Fucus does have flagellated male gametes in some cases.
- Marcellia does not have flagellated male gametes.
- Callotropis also does not have flagellated male gametes.
- Since Marcellia and Callotropis do not have flagellated male gametes, this option is eliminated.

- **Option 3: Rixia, Dryopteris, and Cycas**:
- Rixia has flagellated male gametes.
- Dryopteris has flagellated male gametes.
- Cycas has flagellated male gametes.
- All three plants in this option have flagellated male gametes, making this option correct.

- **Option 4: Anthoceros, Funeria, and Spirogyra**:
- Anthoceros does not have flagellated male gametes.
- Funeria (a moss) has flagellated male gametes.
- Spirogyra has flagellated male gametes.
- Since Anthoceros does not have flagellated male gametes, this option is eliminated.

3. **Conclusion**: The only option where all three plants possess flagellated male gametes is **Option 3: Rixia, Dryopteris, and Cycas**.

### Final Answer:
The correct answer is **Option 3: Rixia, Dryopteris, and Cycas**.