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
A patient presenting with H/0 diarrhea for several years with recent onset pruritus & ↑  Alkaline Phosphatase, normal SGOT/PT& USG shows no gall stones & biliary tract abnormality, the diagnosis is - 
Select and explain. 
A. Hodgkins Lymphoma, B. Sclerosing cholangitis, C. Chronic Hepatitis, D. Autoimmune Hepatitis
B: Sclerosing cholangitis
Answer: B: Sclerosing cholangitis 
Explanation: None