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
Which of the following statements is true regarding cholangitis - 
Select and explain. 
A. Increased leucocyte count, B. Increased transaminases, C. Increased bilirubin, D. All
D: All
Answer: D: All 
Explanation: Answer is (a) Increased leucocyte count, (b) Increased transaminases, (c) Increased bilirubin Above points have been explained in previous questions. Also see Diagnostic evaluation of cholangitis - Ultrasound is the first investigation - it can document the presence of gallstones, will demonstrate dilated ducts but demonstration of cause and site of obstruction is difficult. ERC is the definitive diagnostic test. MRCP is the best non-invasive investigation.