Identify the incorrect pair from the following based on Bentham and Hooker's classification of Polypetalae:

Choose the correct description depicted by the floral diagram.

Morphology is the study of $............$

What is the scientific name of maize?

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:

Column-$I$	Column-$II$
$(1)$ Carrot and turnip	$(p)$ Roots develop from branch
$(2)$ Banyan tree	$(q)$ Taproot
$(3)$ Maize and sugarcane	$(4)$ Shoot system
$(4)$ Bud	$(s)$ Roots develop from lower node of stem