Which of the following families is characterized by $6$ diplostemonous stamens arranged in two whorls?

Bicarpellary,syncarpous,unilocular ovary with basal placentation occurs in

$A$ bicarpellary,syncarpous,bilocular ovary with an axile,swollen placenta and oblique septum is characteristic of which family?

Statement $S$: In $Catharanthus$ $roseus$ (Periwinkle),the number of carpels is two.
Statement $R$: $Catharanthus$ $roseus$ is an example of a bicarpellary condition.

$A$ family delimited by the type of inflorescence is

Butterfly-shaped flowers with one standard,two wing-like,and two keeled petals belong to which family?