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: Medicine
Mirizzi syndrome refers to which of the following? 
Select and explain. 
A. Impacted gallstone in the terminal common bile duct causing complications, B. Stricture in the common hepatic duct, C. Impacted gallstone in the cystic duct causing compression of the common bile duct, D. Duplication of the gallbladder fundus with a septum
C: Impacted gallstone in the cystic duct causing compression of the common bile duct
Answer: C: Impacted gallstone in the cystic duct causing compression of the common bile duct 
Explanation: Mirizzi's syndrome is a complication in which a gallstone becomes impacted in the cystic duct or neck of the gallbladder causing compression of the CBD, resulting in CBD obstruction and jaundice. Reference: Harrisons Principles of Internal Medicine, 18th Edition, Page 2621