Which of the following are a triad of the sign and symptoms of osteogenesis imperfecta________________?

Which of the following are a triad of the sign and symptoms of osteogenesis imperfecta________________?

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

The histopathology of osteopetrosis shows_______________?

The histopathology of osteopetrosis shows_______________?

A. Endosteal bone formation and lack of normal bone resorption
B. Periosteal bone formation and lack of normal bone resorption
C. Persence of extra collagen fibres and less calcification resulting in resistance of bones to fracture
D. Presence of numerous osteoclasts and a few osteoblasts