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': 'Mercaptoethanol splits Ig molecule into \nSelect and explain. \nA. Two H and two L chains, B. Two Fab fragments and one Fc fragment, C. One Fab and two Fc, D. Two H and one L chain', 'role': 'user'}, {'content': 'Answer: A \nExplanation: It cleaves only disulphide bonds thus forming two H and two L chains.', 'role': 'assistant'}]