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: Medicine
[{'content': 'Primary complex in which of the following sites suggest congenital tuberculosis - \nSelect and explain. \nA. Lungs, B. Liver, C. Lymph nodes, D. Skin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]