This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
The pivot test is for: 
Select and explain. 
A. Anterior cruciate ligament, B. Posterior cruciate ligament, C. Medial meniscus, D. Lateral meniscus
A: Anterior cruciate ligament
Answer: A: Anterior cruciate ligament 
Explanation: The pivot shift test was positive for anterior cruciate deficiency. A pivot shift demonstrates a non-functioning ACL. Ref: Surgical Techniques for the Knee By Fred D. Cushner, W. Scott, Giles R. Scuderi, 2006 ; Apley's System of Ohopaedics and Fractures, 8th Edition, Pages 705, 708