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': 'Bence Jones proteins are best described as: \nSelect and explain. \nA. u chains, B. g chains, C. Kappa and Lambda chains, D. Fibrin split products', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Kappa and Lambda chains (Ref: Ananthanarayan, 9th/e, p. 99 and 8th/e, p. 100)* A Bence Jones protein is a monoclonal globulin protein or immunoglobulin light chain found in the urine, with a molecular weight of 22-24 kDa. Detection of Bence Jones protein may be suggestive of multiple myeloma or Waldenstrom's macroglobulinemia.* Bence Jones proteins are light chains of immunoglobulins so may occur as Lambda or Kappa forms, but in any other patient the chain is either Kappa or Lambda, never both.", 'role': 'assistant'}]