The correct option is A Femur
The bone surface is not smooth but scarred with bumps, holes and ridges. These are surface markings, where muscles, tendons and ligaments attached, blood and lymph vessels and nerves pass. Depression and openings are
(1) Fissure- narrow, cleft like opening between adjacent parts of bone. Example, Supra of orbital fissure.
(2) Foramen- a bigger, round opening. Example, foramen magnum.
(3) Meatus- a relatively narrow tubular canal. Example, external auditory meatus .
(4) Groves and sulcus- are deep furrow on the surface of a bone or other structure. Example, inter-vertebral and radial grooves of humerus.
(5) Fossa- shallow depressed area. Example, mandibular fossa.