<prompt> What is the most appropriate for diagnosis of CBD stonesUltrasonographyERCPOCGIV cholangiography  <response>: USG : first test, can document GB stones and estimate the CBD diameter A dilated bile duct 8mm in diameter in a patient with gallstones, jaundice and biliary pain is highly suggestive of choledocholithiasis MRCP : Provides excellent anatomic detail with sensitivity and specificity of 95 and 98 , respectively, for CBD stones ERCP : Diagnostic and therapeutic test of choice for patients with suspected CBD stones Ref: Sabiston 20th edition Pgno :1494 