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
Gustafson's method used for age estimation of tooth includes all except - 
Select and explain. 
A. Primary dentition, B. Root resorption, C. Root transparency, D. Attrition
A: Primary dentition
Answer: A: Primary dentition 
Explanation: Gustafsons method uses attrition, periodontosis, secondary dentin, cementum apposition, root resorption and transparency of root to determine age of adult from dentition. Ref: Dr.Narayana Reddys Synopsis of Forensic Medicine & Toxicology 27th edition pg. 36.