Assertion (A): The cockroach's nervous system is dispersed throughout the entire body.
Reason (R): The thorax contains three ganglia, while the abdomen contains six ganglia.
A and R are correct and R explains A
A and R are correct but R does not explain the A
A is wrong and R is correct
A is correct and R is wrong
The cockroach's nervous system is distributed throughout the body. The suboesophageal ganglion gives rise to a twin nerve cord that goes through the thorax and abdomen. The nerve cord has six ganglia in the abdomen (1st-5th and 7th segments) and three ganglia in the thorax.
Option b is the correct answer.