Which of the following diseases of the bone characteristically exhibits (in contrast to the other three conditions) a single lesion in a single bone ?

Which of the following diseases of the bone characteristically exhibits (in contrast to the other three conditions) a single lesion in a single bone ?

A. Central giant cell granuloma
B. Osteopetrosis
C. Paget’s disease of the bone
D. Polyostotic fibrous dysplasia