Which of the following characteristics is incorrect with respect to cockroach ?

Options :

1. A ring of gastric caeca is present at the junction of midgut and hind gut.

2. Hypopharynx lies within the cavity enclosed by the mouth parts.

3. In females, 7^th-9^th sterna together form a genital pouch.

4. 10^th abdominal segment in both sexes, bears a pair of anal cerci.