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
Potassium Iodide given for cough acts as 
Select and explain. 
A. Central antitussive, B. Expectorant, C. Peripheral antitussive, D. Mucolytic
B: Expectorant
Answer: B: Expectorant 
Explanation: Potassium Iodide is an expectorant that increases bronchial secretion either directly by irritating bronchial glands or indirectly by causing gastric irritation.