This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Hofbauer cells are associated with \nSelect and explain. \nA. Single umbilical aery, B. Maternal diabetes, C. Early pregnancy, D. Erythroblastosis foetalis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Hofbauer cells are oval eosinophilic histiocytes with granules and vacuoles found in the placenta, which are of mesenchymal origin, in mesoderm of the chorionic villus, paicularly numerous in early pregnancy.', 'role': 'assistant'}]