Fluke occurring in human beings is

Options

A. Fasciolopsis
B. Fasciola
C. Dugesia
D. Echinosoccus .

Answer

**Step-by-Step Solution:**

1. **Identify the Type of Fluke**: The question asks for the fluke that occurs in human beings. Flukes are a type of parasitic flatworm.

2. **Know the Common Fluke in Humans**: The most common fluke that infects humans is the liver fluke, specifically known as *Fasciola hepatica*.

3. **Understand the Hosts**:
- The primary hosts for *Fasciola hepatica* are sheep and goats, where the adult fluke resides in the liver and bile ducts.
- The intermediate host is a snail, which plays a crucial role in the life cycle of the fluke.

4. **Recognize the Disease Caused**: Infection by the liver fluke can lead to a disease known as Fascioliasis, which affects the liver and can cause severe symptoms, including liver rot.

5. **Identify Characteristics of the Fluke**:
- *Fasciola hepatica* is a hermaphrodite, meaning it has both male and female reproductive organs.
- It reproduces through cross-fertilization with another worm.

6. **Eliminate Incorrect Options**:
- Other options like *Fasciolopsis*, *Echinococcus*, and *Dugesia* (which refers to planaria) are not the correct answer.
- *Dugesia* is a free-living flatworm and does not cause parasitic infections in humans.

7. **Conclude the Answer**: Based on the information gathered, the correct answer to the question is *Fasciola hepatica*.

**Final Answer**: The fluke occurring in human beings is *Fasciola hepatica*.

---