Units of............ are united or free.

What is the approximate height reached by the Eucalyptus tree?

$A$ : There are two alae in $Pisum$ $sativum$ flower.
$R$ : Both alae are covered by the largest petal.

$S$ Statement: Amorphophallus (Elephant foot yam) has a large inflorescence of about $6 \ m$ height.
$R$ Statement: Rafflesia arnoldii has the largest flower with a weight of about $8 \ kg$ and a diameter of about $1 \ m$.

Match the following columns:

Column-$I$	Column-$II$
$(A)$ Inferae	$(i)$ Hibiscus
$(B)$ Heteromerae	$(ii)$ Lemon
$(C)$ Bicarpellatae	$(iii)$ Sunflower
$(D)$ Thalamiflorae	$(iv)$ Madhuca
$(E)$ Calyciflorae	$(v)$ Catharanthus
	$(vi)$ Rose

Majority of the orchids are