Radius and ulna are bones of the? by Sunday | Dec 22 | Biology WAEC | 0 comments A. pectoral girdle B. upper arm C. pelvic girdle D. lower arm Correct Answer: Option D – lower arm Users Also Read These:In an ideal wheel an axle system; R stand for the…The diagram above illustrates a part of the human…In which of the following atoms is the ionic radius…The type of joint between adjacent bones in the part…The bones labelled II are called?