The correct option is
C Cartilaginous bone
Femur and humerus are cartilaginous bones. These bones ossify from a cartilage model and this type of ossification is known as intra-cartilaginous ossification. These bones do not formed from mesenchymal condensations but from preformed cartilage models. Examples of this type of bones include bones of limbs, vertebral column and thoracic cage.
Hence the correct option is C.