Complete metamorphosis is found in

Identify the mouthparts of the cockroach shown in the figure.

Statement $-A:$ $Periplaneta$ $americana$ is a nocturnal,omnivorous,and household pest.
Reason $-R:$ It acts as a scavenger.

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 $P, Q, R$.

Johnston's organ is found in

Which of the following characteristics is $NOT$ found in the cockroach $(Periplaneta \text{ } americana)$?