Ans:B.)Clavicle.Assessment of Bone Age: BoneOssification CentresClavicle,Mandible and Membranous Bones of the Skull50 days to 5 months of GestationOs Calcis(Calcaneum) and Talus22-26 weeks of gestationDistal Epiphysis of Femur31-39 weeks of gestationProximal Epiphysis of Tibia34 weeks of gestation to 5th week post-natallyCuboid36 weeks of gestation to 8th week post-natallyProximal end of Humerus37 weeks of gestation to 16 weeks post-natally