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': 'A single immunoglobulin molecule contains ? \nSelect and explain. \nA. 1 light chain, 1 heavy chain, B. 2 heavy chains, 1 light, C. 2 light chains, 2 heavy chains, D. 2 light chains, 1 heavy chain', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., 2 Light chains, 2 Heavy Chains", 'role': 'assistant'}]