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: Forensic Medicine
[{'content': 'Rule of Haase is used to calculate? \nSelect and explain. \nA. Age of fetus, B. Length of femur, C. Diameter of skull, D. Percentage of burns', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Age of fetus", 'role': 'assistant'}]