Which is correct ?

Options

A. Rat- Left kidney is slightly higher in position than the right one
B. Cockroach - 10 pairs of spiracles (2 thorax, 8 abdomen)
C. Earthworm - Alimentary canal has pharynx, oesophagus, stomach, gizzard and intestine
D. Frog - Body divisible into head, neck and trunk

Answer

To solve the question "Which is correct?" regarding the statements about different animals, we will analyze each option provided in the video transcript step by step.

### Step-by-Step Solution:

1. **Analyze the first statement about the rat's kidneys:**
- The statement claims that the left kidney is slightly higher in position than the right one.
- **Fact Check:** In rats, the right kidney is actually slightly higher than the left due to the presence of the liver on the right side.
- **Conclusion:** This statement is **incorrect**.

2. **Analyze the second statement about the cockroach:**
- The statement claims that the cockroach has 10 pairs of spiracles, 2 thoracic segments, and 8 abdominal segments.
- **Fact Check:** Cockroaches do indeed have 10 pairs of spiracles (5 pairs on the thorax and 5 pairs on the abdomen), 2 thoracic segments, and 8 abdominal segments.
- **Conclusion:** This statement is **correct**.

3. **Analyze the third statement about the earthworm:**
- The statement describes the earthworm's elementary canal as having pharynx, esophagus, stomach, gizzard, and intestine.
- **Fact Check:** The elementary canal of an earthworm is a straight tube that consists of the mouth, buccal chamber, pharynx, esophagus, gizzard, stomach, intestine, and anus. The statement is missing parts of the canal.
- **Conclusion:** This statement is **incorrect**.

4. **Analyze the fourth statement about the frog:**
- The statement claims that the body of a frog is divisible into head, neck, and trunk.
- **Fact Check:** The body of a frog is actually divisible into head and trunk; frogs do not have a distinct neck.
- **Conclusion:** This statement is **incorrect**.

### Final Conclusion:
The only correct statement is about the cockroach, which has 10 pairs of spiracles, 2 thoracic segments, and 8 abdominal segments.