What is the size of $Wolffia$?

The longest cell of plants is found in:

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 plants in Column-$I$ with their specific floral characteristics in Column-$II$ and select the correct option.

Column-$I$	Column-$II$
$(A)$ China rose	$(p)$ Thalamus disc-shaped
$(B)$ Lemon	$(q)$ Ovary inferior
$(C)$ Rose	$(r)$ Thalamus dome-shaped
$(D)$ Sunflower	$(s)$ Perianth
$(E)$ Bougainvillea	$(t)$ Thalamus cup-shaped
	$(u)$ Ovary superior

Which of the following is an adaptation to reduce water loss?

Which of the following is not a stem modification?