Olecranon process of ulna helps in formation of?
Ans. is 'b' i.e., Trochlear notch Inner surface of olecranon process forms trochlear notch for aiculation of trochlea of humerus. Radial notch is seen in lateral pa of upper end of shaft (not on olecronon). Olecranon fossa and coronoid fossa are pa of lower end of humerus.
Radial notch
Trochlear notch
Olecranon fossa
Coronoid fossa.