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: Surgery
CBD microliths are diagnosed by 
Select and explain. 
A. ERCP, B. EUS, C. HIDA, D. CT
B: EUS
Answer: B: EUS 
Explanation: CBD stones IOC is MRCP
Micro stones are detected by EUS.