In both sexes of cockroach, a pair of jointed filamentous structures called anal cerci are present on

The correct option is 10th segment.

Step-by-step Explanation:
1. Anatomy of Cockroach Abdomen: The abdomen of both male and female cockroaches consists of 10 segments in adults.
2. Anal Cerci: Anal cerci are a pair of jointed, filamentous, and sensitive sensory structures.
3. Position: These structures arise from the lateral sides of the 10^th abdominal segment in both sexes (males and females). They help the cockroach detect vibrations and wind movements in their surroundings.
4. Distinction: While anal cerci are present in both sexes on the 10^th segment, male cockroaches also possess a pair of short, thread-like, unjointed anal styles on the 9^th sternum, which are absent in females.