The correct answer is:
The Type I fracture is non-displaced and does not interfere with knee extension. The type II fracture has a posterior hinge with the anterior portion being elevated. In this type, knee extension is generally limited, and there is a possibility that the anterior horn of the meniscus is caught under the anterior fracture fragment. A type III fracture is fully displaced, usually with the knee held in a mildly flexed position.
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