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
Which one of the following is not likely to be associated with pulmonary flbrosis ? 
Select and explain. 
A. Coal miners lung, B. Primary sclerosis cholangitis, C. Primary biliary cirrhosis, D. Ankylosing spondylitis
B: Primary sclerosis cholangitis
Answer: B: Primary sclerosis cholangitis 
Explanation: None