Total number of moulting in the life history of Ascaris are

Options

A. Four
B. Three
C. Two
D. One

Answer

**Step-by-Step Solution:**

1. **Understanding Ascaris**: Ascaris is a common parasitic nematode that infects the human intestine, causing a disease known as Ascariasis.

2. **Life Cycle of Ascaris**: The life cycle begins when a person ingests food or water contaminated with Ascaris eggs (larval stage). These eggs hatch in the intestine, leading to the formation of larvae.

3. **Moulting Definition**: Moulting refers to the process where an organism sheds its outer body parts to grow. This is a crucial part of the life cycle for nematodes like Ascaris.

4. **Stages of Moulting**:
- The first moulting occurs in the soil after the eggs hatch into larvae.
- The second and third moulting stages happen after the larvae enter the human host and migrate to the lungs (specifically in the alveoli).
- The fourth moulting occurs in the intestine as the larvae mature into adult Ascaris.

5. **Conclusion**: Therefore, the total number of moulting stages in the life history of Ascaris is four.

**Final Answer**: The total number of moulting in the life history of Ascaris is 4.

---