Explanation
1. The body of female cockroach is relatively larger than the male.
2. The abdomen of female cockroach is boat-shaped and the last segment is blunt.
3. The wings of female cockroach are smaller than that of the males and extend up to the tip of the abdomen.
4. The antennae are relatively larger than that of the males.
5. Only a pair of anal cerci is present in of female cockroach.
6. The sternum of mesothorax is bifid.
So the correct option is 'anal styles'.
