This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thigh, Knee,Leg,Foot & Ankle injuries, Subject name: Orthopaedics
PIVOT TEST is used test for ? 
Select and explain. 
A. Medial meniscus, B. Lateral meniscus, C. Anterior cruciate ligament, D. Posterior cruciate ligament
C: Anterior cruciate ligament
Answer: C: Anterior cruciate ligament 
Explanation: In this test,patient is in supine position.The knee is extended,with a valgus stress applied on the knee and the tibia is internally rotated.The knee is slowly flexed.Subluxation occurs at 30-40 degrees. A positive test indicates anterior cruciate ligament tear. ref:JohnEbnezar textbook,4th edition page no.250