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
In "bounce home" test of knee joint, end feel is described as all, EXCEPT: 
Select and explain. 
A. Bony, B. Empty, C. Springy, D. Firm
B: Empty
Answer: B: Empty 
Explanation: Bounce home test can be used to detect tear of lateral meniscus. In this test the examiner holds the patients heel cupping around and passively extending the knee from a fully flexed position of hip and knee in supine. If the extension is not complete or has a rubbery end feel with elastic resistance to blocking full extension it indicates bucket handle type of meniscal tear. Springy bounce feeling is probably a pseudolock due to a possible muscle spasm. A firm hard end point is consistent with intraicular adhesions or an osseus type lesion.