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': 'Thymus has \nSelect and explain. \nA. Interstitial dendritic cells, B. Interdigitating dendritic Cells, C. Circulating dendritic cells, D. Follicular dendritic cells', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Interstitial dendritic cells - Lungs, liver, spleen\nInterdigitating dendritic cells - Thymus\nCirculating dendritic cells - Blood & lymph\nFollicular dendritic cells - Lymph nodes.', 'role': 'assistant'}]