In Moringa $(Drumstick)$,the leaves are

Match the following columns:

Column-$I$ (Phyllotaxy)	Column-$II$ (Plants)
$P$. Alternate	$I$. Alstonia
$Q$. Opposite	$II$. Calotropis
$R$. Whorled	$III$. Opuntia
	$IV$. Mustard

When leaves bear flowers or inflorescences in their axils,they are called:

$A$ compound leaf,which appears as a simple leaf due to the suppression of one or two leaflets,is found in which of the following plants?

Which plant exhibits the heterophylly shown in the image below?

What is a leaf called that has stomata only on its upper surface?