Which of the following features is used to identify a male cockroach from a female cockroach?

Options

(a) Presence of anal cerci
(b) Forewings with darker tegmina
(c) Presence of caudal styles
(d) Presence of a boat shaped sternum on the 9th abdominal segment

Correct Answer:

Presence of caudal styles

Explanation:

Males bear a pair of short, thread like anal styles which are absent in females.Anal/caudal styles arise from 9th abdominal segment in male cockroach.