This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': "Which of the following traditional medicines is effective in the treatment of hea failure \nSelect and explain. \nA. Terminalia Arjuna, B. Neem bark extract, C. St. John's wo, D. Gingkoba biloba", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. a. Terminalia Arjuna Terminalia Arjuna (An ayurvedic cardioprotective botanical) Although many Ayurvedic plants have shown to help coronary aery disease, Arjuna (Terminalia Arjuna) by far seems to be the best plant for hea health. Terminalia arjuna is a traditional ayurvedic plant containing tannins, triterpenoid saponins (arjungenin, arjunglucosides), flavonoids (arjunon, arjonolone), phytosterols, oligomeric proanthocyanidins (OPC's), calcium, magnesium, zinc, and copper.", 'role': 'assistant'}]