● Option (1) is incorrect because a ring of gastric caecae is present at the junction of foregut and midgut. At the junction of midgut and hindgut, malpighian tubules are present. ● Hypopharynx lies within the cavity enclosed by mouthparts. ● In female cockroach, the 7th sternum is boat shaped and together with the 8th and 9th sterna forms a genital pouch. ● 10th abdominal segment in both sexes, bears a pair of anal cerci and 9th sternum only in male cockroach, bears a pair of chitinous anal style.