Choose the structures that are exclusive to male cockroach and mark the correct option.

a. Anal cerci

b. Anal styles

c. Colleterial glands

d. Mushroom gland

A characteristic mushroom shaped gland is present in the $6^{\mathrm{th}}-7^{\mathrm{th}}$ abdominal segments which functions as an accessory reproductive gland in male cockroach. Males also bear a pair of short, thread like anal styles which are absent in females.

In both sexes, the ${10}^{\mathrm{th}}$segment bears a pair of jointed filamentous structures called anal cerci.

In females, the $7^{\mathrm{th}}$ sternum is boat shaped and together with the $8^{\mathrm{th}}$and $9^{\mathrm{th}}$sterna forms a brood or genital pouch whose anterior part contains female gonopore, spermathecal pores and colleterial glands.