Which of the following is an incorrect series of Polypetalae?

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:

Identify $X$ in the given figure.

Among China rose,mustard,brinjal,potato,guava,cucumber,onion and tulip,how many plants have superior ovary?

$A$. Citrus and Ricinus have synandrous condition.
$B$. In epitepalous condition,the cohesion occurs between tepal and filament of stamen.
$C$. Tetradynamous condition consists of two long and four short stamen filaments.

Which of the following species is used to obtain both edible oil and fibers?