Select the CORRECT statements regarding periplaneta americana.
I. A ring of 6-8 blind tubules called hepatic or gastric caeca is present at the junction of foregut and midgut.
II. The lower lip is called labium and the upper lip is called the labrum.
III. Tegmina are mesothoracic wings that are opaque, leathery, and dark.
IV. It has a vision known as a mosaic vision with more resolution but less sensitivity.

Options

A. I,II and III only
B. I,III and IV only
C. I,II,III and IV only
D. III and IV

Answer

To solve the question about Periplaneta americana (the American cockroach), we will evaluate each statement one by one to determine which are correct.

### Step-by-Step Solution:

1. **Statement I**: "A ring of 6-8 blind tubules called hepatic or gastric caeca is present at the junction of foregut and midgut."
- **Evaluation**: This statement is correct. The gastric caeca are indeed present at the junction of the foregut and midgut in cockroaches. They serve a digestive function by secreting digestive juices.

2. **Statement II**: "The lower lip is called labium and the upper lip is called the labrum."
- **Evaluation**: This statement is also correct. In the mouthparts of the cockroach, the lower lip is referred to as the labium, and the upper lip is called the labrum.

3. **Statement III**: "Tegmina are mesothoracic wings that are opaque, leathery, and dark."
- **Evaluation**: This statement is correct as well. The tegmina are indeed the forewings of the cockroach, which are leathery and opaque, providing protection to the hindwings.

4. **Statement IV**: "It has a vision known as a mosaic vision with more resolution but less sensitivity."
- **Evaluation**: This statement is incorrect. While cockroaches do have mosaic vision, it is characterized by high sensitivity but low resolution. The eyes are made up of many omatidia, which provide good detection of movement but not clarity.

### Conclusion:
The correct statements regarding Periplaneta americana are:
- I, II, and III are correct.
- IV is incorrect.

Thus, the correct answer is statements I, II, and III.