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:Which of the following will ease the friction…In the circle below, with centre O and radius 7 cm.…The bones labelled II are called?In which of the following atoms is the ionic radius…Muscles are attached to bones by means of?