The gizzard of a cockroach is a part of which system?

Phallic organs in cockroach are related to

If the head of a cockroach is removed,it may live for a few days because:

In cockroach,the excretory organs are

Match column-$I$ with column-$II$ and choose the correct option.

Column $I$	Column $II$
$A$. Periplaneta americana	$I$. Hepatic caecae
$B$. $A$ ring of $6-8$ blind tubules	$II$. Phylum Arthropoda
$C$. Vascular system	$III$. Spiracles
$D$. $10$ pairs of small holes	$IV$. Malpighian tubules
$E$. Excretion	$V$. Open type

Which of the following statement$(s)$ is/are correct about the nervous system of a cockroach?
$(i)$ It consists of a series of fused segmentally arranged ganglia joined by paired longitudinal connectives on the ventral side.
$(ii)$ There are six ganglia lie in the thorax,and three in the abdomen.
$(iii)$ The sense organs are antennae,eyes,maxillary palps,labial palps,and anal cerci,etc.
$(iv)$ Each eye consists of about $5000$ hexagonal ommatidia.