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: Dental
Most commonly missing primary teeth are: 
Select and explain. 
A. Maxillary central incisors, B. Mandibular central incisors, C. Maxillary lateral incisors, D. Maxillary canines
D: Maxillary canines
Answer: D: Maxillary canines 
Explanation: Developmental agenesis of primary teeth is relatively rare. When several primary teeth fail to develop, other ectodermal deficiencies are usually evident. Most commonly missing primary teeth are maxillary canines.
Reference: McDONALD AND AVERY’S DENTISTRY for the CHILD and ADOLESCENT, 10th ed page no 64