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': 'Rule of Hasse is used to determine: \nSelect and explain. \nA. The age of fetus, B. Height of an adult, C. Race of a person, D. Identification', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]