- A$CNS$ is the site of information processing and control
- B$CNS$ includes brain and spinal cord
- CThe $PNS$ consists of the nerves and ganglia outside the brain and spinal cord.
- ✓None of the above

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$I.$ $AIDS$ patient become easily infected by bacteria, viruses and even parasites
$II.$ The person is unable to protect himself against any infection
$III.$ National $AIDS$ Control Organisation $(NACO)$ and non-governmental organization are trying their best to educate people about $AIDS$
Which of the statements given above are correct?
$(i)$ The body of the cockroach is segmented and divisible into three distinct regions - head, thorax and abdomen.
$(ii)$ Blood vascular system is of closed type.
$(iii)$ They are monoecious and both seves have well developed reproductive organs.
$(iv)$ The development of P. americana is paurometabolus, meaning there is development through nymphal stage.