Clavicle is absent in:: (A) Osteogenesis imperfecta, (B) Cleidocranial dysostosis, (C) Fibrous dysplasia, (D) Osteopetrosis
Answer is B. Cleidocranial Dysplasia
(Marie and Sainton’s disease, Scheuthauer-Marie-Sainton syndrome, mutational dysostosis).
A congenital disorder of bone formation manifested with clavicular hypoplasia or agenesis with a narrow thorax, which allows approximation of the shoulders in front of the chest.