Match the correct pairs regarding the anatomy of a cockroach:

Column-$I$	Column-$II$
$1$. Exoskeleton	$p$. Thorax
$2$. Three ganglia	$q$. Chitin
$3$. One pair of seminal vesicles	$r$. $6^{th}-7^{th}$ segments of abdomen
$4$. Mushroom-shaped gland	$s$. $6^{th}$ segment

• A
  $(1-p), (2-q), (3-r), (4-s)$
• B
  $(1-q), (2-p), (3-s), (4-r)$
• C
  $(1-q), (2-s), (3-p), (4-r)$
• D
  $(1-p), (2-r), (3-q), (4-s)$