[Presence of caudal styles] Which of the following features is used to identify a male cockroach from a female cockroach?

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

Forewings with darker tegmina

Presence of caudal styles

Presence of a boat shaped sternum on the 9th abdominal segment

Presence of anal cerci

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.

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