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
Bromhexine acts by 
Select and explain. 
A. Central opiod agonism, B. Muscarine receptor antagonism, C. Depolymerisation of mucopolysaccharides, D. MAO inhibitor
C: Depolymerisation of mucopolysaccharides
Answer: C: Depolymerisation of mucopolysaccharides 
Explanation: Bromhexine acts by depolymerisation of mucopolysaccarides and making the mucus less viscid and thus acts as a expectorant.