This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Human identification, Subject name: Forensic Medicine
[{'content': 'Regarding rugoscopy, all are true except? \nSelect and explain. \nA. Palatal rugae are used as a method of identification, B. Palatoprints do not change during growth, C. Primary rugae are less than 3mm, D. Secondary rugae are 3-5mm', 'role': 'user'}, {'content': 'Answer: C \nExplanation: View of the hard palate showing palatal rugae. Torus palatinus,a bony protrusion on the palate is also visible. Primary rugae are 5-10mm or more. Secondary rugae are 3-5mm. Fragmented rugae are less than 3mm. Palatal rugae are unique to each person. Harrison Allen, in 1889, suggested the use of palatal rugae for identity verification.', 'role': 'assistant'}]