The type of egg found in a cockroach is known as?

Johnston's organ is found in

Segments in the head of a cockroach - $P$
Segments in the thorax of a cockroach - $Q$
Segments in the abdomen of a cockroach - $R$
Select the correct option for $P, Q, R$.

The ommatidia are found in the eyes of .........

The cockroach is ....... .

Which of the following is the correct taxonomic classification of a cockroach?