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: Orthopaedics
All of the following features in the knee are recognized to be consistent with a torn medial meniscus, except -a) Excessive forward glideb) Giving wayc) Lockingd) Mc.Murray's sign 
Select and explain. 
A. ac, B. ab, C. ad, D. bc
B: ab
Answer: B: ab 
Explanation: Feeling of giving way (i.e., feeling of instability) and excessive forward gliding is seen in ACL injury (not in meniscus injury).