the stage absent in life cycle of schistosoma is

Options

A. Miracidium
B. Redia
C. Capsule
D. Cercaria

Answer

To solve the question regarding the stage absent in the life cycle of Schistosoma, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Organism**: Schistosoma is a genus of parasitic worms known as blood flukes. They are responsible for the disease schistosomiasis.

2. **Identify the Life Cycle Stages**: The life cycle of Schistosoma includes several stages:
- Eggs
- Miracidium
- Sporocyst
- Cercaria
- Adult worms

3. **Examine the Options**: The question provides four options:
- A) Miracidium
- B) Rhedia
- C) Capsule
- D) Cercaria

4. **Analyze Each Stage**:
- **Miracidium**: This is a larval stage that hatches from the egg and is present in the life cycle.
- **Rhedia**: This stage is not part of the Schistosoma life cycle; it is found in the life cycle of other flukes, such as the liver fluke.
- **Capsule**: This term refers to the structure that contains the eggs and is involved in the life cycle.
- **Cercaria**: This is a larval stage that emerges from the snail and penetrates the human skin, which is present in the life cycle.

5. **Conclusion**: The stage that is absent in the life cycle of Schistosoma is **Rhedia**. Therefore, the correct answer is option B.

### Final Answer:
The stage absent in the life cycle of Schistosoma is **Rhedia** (Option B).

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