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 antidotes is used for calcium channel blockers overdose ? \nSelect and explain. \nA. Atropine, B. Calcium gluconate, C. Adrenaline, D. Digoxin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]