Cardiac glycosides are obtained from following plant source:: (A) Rauwolfia serpentina., (B) Strophanthus gratus., (C) Ricinus communis., (D) Atropa belladonna.
Answer is B. The following are obtained from Rauwolfia serpentina--Reserpine. Strophanthus gratus--Strophanthin-G (Ouabain) A cardiac glycoside. Ricinus communis--Castor oil. Atropa belladonna--Atropine