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: Pathology
Absence of pulp chambers is seen in 
Select and explain. 
A. Craniofacial dysostosis, B. Dentinogenesis imperfecta, C. Amelogenesis imperfecta, D. Any of the above
B: Dentinogenesis imperfecta
Answer: B: Dentinogenesis imperfecta 
Explanation: None