This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
[{'content': 'Cryoglobulins are present in blood in which of the following clinical scenarios \nSelect and explain. \nA. Macroglobulinaemia, B. SLE, C. Myeloma, D. All the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Cryoglobulins if present in blood, form precipitates in patients serum when it is cooled down. They are a type of abnormal immunoglobulin disorder Ref: Textbook of Microbiology Baveja 5th ed Pg 102', 'role': 'assistant'}]