Consider the following statements:
$I$. In racemose inflorescence,the flowers are borne in a basipetal order.
$II$. Epigynous flowers are seen in rose plant.
$III$. In brinjal,the ovary is superior.
Which of these statements are correct?

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:

Choose the correct description depicted by the floral diagram.

Describe the various parts of a flowering plant with the help of a diagram.

$Casuarina$ $equisetifolia$ is a

$S:$ Lemon is an example of Disciflorae.
$R:$ In lemon,the thalamus is cup-shaped.