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
[{'content': 'False positive rheumatoid factor can be associated with all except - \nSelect and explain. \nA. Inflammatory bowel disease, B. HbsAg, C. VDRL, D. Coombs test', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]