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.