Number of pairs of valves found in lateral oesophageal heart of Pheretima is
(a) 1
(b) 2
(c) 3
(d) 4

Options

A. 1
B. 2
C. 3
D. 4

Answer

To solve the question regarding the number of pairs of valves found in the lateral esophageal heart of Pheretima, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure**: The lateral esophageal heart is a part of the circulatory system in Pheretima (earthworm). It plays a role in connecting different blood vessels.

2. **Identify the Valves**: The question specifically asks about the number of pairs of valves in the lateral esophageal heart.

3. **Recall the Information**: From the video transcript, it is mentioned that the lateral esophageal heart has two pairs of valves on the posterior side that connect the dorsal blood vessel to the supraesophageal blood vessel.

4. **Differentiate Between Types of Hearts**: The transcript also mentions that there are different types of hearts in Pheretima:
- The lateral esophageal heart has three pairs of valves.
- The lateral heart has four pairs of valves.

5. **Conclude the Answer**: Based on the information provided, the lateral esophageal heart has three pairs of valves.

6. **Select the Correct Option**: Therefore, the correct answer is option (c) 3.

### Final Answer:
The number of pairs of valves found in the lateral esophageal heart of Pheretima is **3** (option c).

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