This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Orthopaedics
Mechanism of injury in lateral condylar fracture of proximal tibia 
Select and explain. 
A. Strain of valgus knee, B. Strain of varus knee, C. Strain of valgus knee with axial loading, D. Rotational injury
D: Rotational injury
Answer: D: Rotational injury 
Explanation: Tibial plateau fracturesMechanism of injury: Fractures of the tibial plateau are caused by virus or valgus force combined with axial loadingIt is more often seen in cases of fall from height in which the knee is forced into varus or valgusClassification: Schatzker classification for the proximal tibia fractures(Refer: Mohindra's Fundamentals of Ohopedics, 2nd edition, pg no. 147)