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': 'Potassium Iodide given for cough acts as \nSelect and explain. \nA. Central antitussive, B. Expectorant, C. Peripheral antitussive, D. Mucolytic', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Potassium Iodide is an expectorant that increases bronchial secretion either directly by irritating bronchial glands or indirectly by causing gastric irritation.', 'role': 'assistant'}]