Select the correct option with respect to cockroaches.

Step-by-step solution

In cockroaches, male have paired anal styles on 9^ th abdominal sternite, which are absent in females. It helps in holding females during copulation. Malpighian tubules are main excretory organs which extract nitrogenous wastes and water from haemolymph and reabsorb certain salts, forming uric acid crystals. Nervous system comprises of a ventral nerve cord and 10 pairs of ganglia. Forewings are highly sclerotised and are not used in flight purpose. They are used to protect the hindwings at rest. Related Theory In c