This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Identification, Subject name: Forensic Medicine
[{'content': 'Stack formula for age estimation from teeth is for - \nSelect and explain. \nA. Infants, B. Young, C. Elderly, D. None', 'role': 'user'}, {'content': "Answer: A \nExplanation: Stack's method is used to determine age of infants from weight and height of erupting teeth of child. This can be used for deciduous and permanent teeth during erupting phase. Ref.:Dr. Narayana Reddys Synopsis of Forensic Medicine & Toxicology 27th edition pg. 37.", 'role': 'assistant'}]