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
Which of the following are a triad of the sign and
symptoms of osteogenesis imperfecta 
Select and explain. 
A. blue sclera, sparse hair, anhydrosis, B. enlarged hand, feet, maxilla, mandible, C. blue sclera, brittle bones, opalescent dentin, D. blue sclera, arachnodactyly, brittle bones
C: blue sclera, brittle bones, opalescent dentin
Answer: C: blue sclera, brittle bones, opalescent dentin 
Explanation: None