This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper Limb Traumatology, Subject name: Orthopaedics
Hotchkiss terrible triad does not include which of the following injuries? 
Select and explain. 
A. Head of radius fracture, B. Posterior elbow subluxation, C. Olecranon fracture, D. Fracture of coronoid process
C: Olecranon fracture
Answer: C: Olecranon fracture 
Explanation: A Hotchkiss traumatic injury pattern of the elbow characterized by elbow dislocation(often associated with posterolateral dislocation or LCL injury) radial head or neck fracture coronoid process fracture Olecranon fracture is not the pa of terrible triad.