Internal fixation is probably needed in all of the following except
D i.e. Fracture scaphoid Fracture neck femur, intercondylar humerus and olecranon are mostly managed by operative intervention & internal fixation; where as fracture scaphoid is usually managed conservatively by cast application.
Fracture condyle of humerus
Fracture neck of femur
Fracture of Olecranon
Fracture of scaphoid