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: Microbiology
[{'content': 'Poion of immunoglobulin molecule with molecular weight of 50,000 - \nSelect and explain. \nA. Secretory piece, B. H Chain, C. L Chain, D. J piece', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., H chain . The H chain has molecular weight of 50, 000. . The L chain has molecular weight of 25, 000.", 'role': 'assistant'}]