The following diagrams represent the type of placentation in an ovary. Identify the correct combination of labelling for $1 - 2 - 3$.

Stem thorns,leaf spines,and prickles are examples of ........

Identify the correct set of statements :
$(a)$ The leaflets are modified into pointed hard thorns in Citrus and Bougainvillea
$(b)$ Axillary buds form slender and spirally coiled tendrils in cucumber and pumpkin
$(c)$ Stem is flattened and fleshy in Opuntia and modified to perform the function of leaves
$(d)$ Rhizophora shows vertically upward growing roots that help to get oxygen for respiration
$(e)$ Subaerially growing stems in grasses and strawberry help in vegetative propagation
Choose the correct answer from the options given below:

Match the following symbols and terms used in floral formulas:

Column-$I$	Column-$II$
$(a)$ $\oplus$ or $\text{symbol shown}$	$(p)$ Perianth
$(b)$ $\overline{G}$	$(q)$ Bracteate
$(c)$ $P$	$(r)$ Inferior ovary
$(d)$ $Br$	$(s)$ Bisexual

$S$ 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 $1 \ m$.

How many plants in the list given below have marginal placentation: Mustard,Gram,Tulip,Asparagus,Arhar,Sun hemp,Chilli,Colchicum,Onion,Moong,Pea,Tobacco,Lupin?