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
A 3-year-old child presents with only deciduous canine
and molars. The child has light fine hair, light complexion
and overall appearance of an older person. The findings
suggest: 
Select and explain. 
A. Cleidocranial dysostosis, B. Osteogenesis imperfecta, C. Crouzan's disease, D. Ectodermal dysplasia
D: Ectodermal dysplasia
Answer: D: Ectodermal dysplasia 
Explanation: None