This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genetics, Subject name: Medicine
[{'content': 'Mucociliary is increased in cystic fibrosis by \nSelect and explain. \nA. Mannitol, B. Amiloride, C. Acetazolamide, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Amiloride, a sodium channel blocker, has been shown to improve pulmonary mucociliary clearance in patients with cystic fibrosis. For the drug study measurements were also made on two consecutive days, after administration of nasally nebulised amiloride or placebo (saline) in a double blind manner. Ref Robbins 9/e pg 178', 'role': 'assistant'}]