Albers-Schönberg disease, a rare mild autosomal dominant disease caused by mutation of CLCN7, which encodes a proton-chloride exchanger on the osteoclast surface that is required for resorption pit acidification, is a form of :
(A) Osteogenesis Imperfecta
(B) Osteoporosis
(C) Osteopetrosis
(D) Osteitis Deformans
(E) Osteitis Fibrosa Cystica
E
THE CORRECT ANSWER : C – OSTEOPETROSIS