Name the whorls of a flower from the inside to the outside.

In which of the following plants are both staminate and pistillate flowers found on the same individual?

The diagram given denotes the various parts of a typical flower. Identify the labelled parts $A$,$B$,$C$,and $D$ and choose the correct option.

Given below are two statements: One is labelled as Assertion $A$ and the other is labelled as Reason $R$:
Assertion $A$: $A$ flower is defined as a modified shoot wherein the shoot apical meristem changes to a floral meristem.
Reason $R$: The internode of the shoot gets condensed to produce different floral appendages laterally at successive nodes instead of leaves.
In the light of the above statements,choose the correct answer from the options given below:

What do angiosperms and gymnosperms produce for sexual reproduction,respectively?

$S$: The Amorphophallus (Ramban) has a large inflorescence of about $6 \ m$ height.
$R$: Rafflesia arnoldii has the largest flower,weighing about $8 \ kg$ and having a diameter of about $1 \ m$.