Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Digitonin of Digitalis is an example of saponin with distinctive property of frothing.
Reasons (R): Saponin are plant glycosides and they are non-crystalline and dissolve in water with colloidal solutions.
In the light of the above statements, choose the most appropriate answer from the options given below :