Both alternation of generation and alternation of hosts are present in

Options

A. Wuchereria
B. Fasciola
C. Taenia
D. Ascaris

Answer

To solve the question regarding which organism exhibits both alternation of generation and alternation of hosts, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Key Terms**:
- **Alternation of Generation**: Also known as metagenesis, this refers to the life cycle of an organism that alternates between sexual and asexual reproduction.
- **Alternation of Hosts**: This refers to a life cycle that involves different hosts for different stages of the organism's life.

2. **Analyzing the Options**:
- **Option 1: Eugenia**: This is not a known organism that exhibits both alternation of generation and alternation of hosts.
- **Option 2: Fasciola**: Known as the liver fluke, Fasciola exhibits both alternation of generation and alternation of hosts. It has a primary host (sheep) and a secondary host (snail).
- **Option 3: Taenia**: This is a genus of tapeworms that does not exhibit both alternation of generation and alternation of hosts.
- **Option 4: Ascaris**: This is a roundworm that does not exhibit these characteristics either.

3. **Identifying the Correct Answer**:
- After analyzing each option, we find that **Fasciola** is the only organism that shows both alternation of generation and alternation of hosts.

4. **Conclusion**:
- The correct answer is **Option 2: Fasciola**.