The places of first, second and third moulting of Ascaris larva are

Options

A. Soil, alveoli, lung
B. liver, soil, stomach
C. soil, lung, liver
D. soil, intestine, lung

Answer

To answer the question regarding the places of first, second, and third moulting of Ascaris larvae, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the First Moulting Location:**
- The first moulting of Ascaris larvae occurs in the soil. Here, the larvae are present and undergo their initial transformation.

2. **Identify the Second Moulting Location:**
- After the larvae are ingested through contaminated food, they reach the stomach. The second moulting takes place in the intestine, where the larvae further develop.

3. **Identify the Third Moulting Location:**
- Following the second moulting, the larvae migrate from the intestine to the lungs. The third moulting occurs in the alveoli of the lungs, where they continue their development.

4. **Summarize the Locations:**
- Therefore, the sequence of moulting locations for Ascaris larvae is:
- First Moulting: Soil
- Second Moulting: Intestine
- Third Moulting: Lung

5. **Select the Correct Option:**
- Based on the options provided, the correct answer is "soil, intestine, lung."

### Final Answer:
The places of first, second, and third moulting of Ascaris larvae are **soil, intestine, and lung**.