To solve this problem, we need to identify the segment on which the anal cerci are present in cockroaches.$\newline$Let's analyze the anatomy of a cockroach:$\newline \bullet$Cockroaches have a segmented body divided into three main parts: head, thorax, and abdomen.$\newline \bullet$The abdomen of a cockroach consists of 10 visible segments.$\newline \bullet$In both male and female cockroaches, a pair of jointed filamentous structures called anal cerci are present.$\newline \bullet$These anal cerci are sensory organs that help in detecting vibrations and are located on the 10th segment of the abdomen.$\newline$Therefore, the anal cerci are present on the 10th segment.$\newline$This corresponds to Option 4.