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: Gynaecology & Obstetrics
[{'content': 'Progesterone is produced by \nSelect and explain. \nA. Granulosa luteal cells, B. Stroma ot the ovary, C. Theca cells, D. Seoli cells', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Granulosa luteal cells', 'role': 'assistant'}]