<prompt> Football player with knee injury diagnosed as medial collateral ligament injury. Which structure is most commonly associated with this type of injury?Anterior cruciate ligamentMedial meniscusPosterior Cruciate LigamentLateral lemniscus  <response>: Medial meniscus injury is associated with medial collateral ligament injury. Terrible triad: Seen in football players Foot is fixed to ground and knee is in flexion Sustain injury to medial meniscus, anterior cruciate ligament medial collateral ligament. 