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: Forensic Medicine
Flail chest means fracture of: PGI 12 
Select and explain. 
A. Two ribs on same side, B. Two ribs on opposite side, C. Four ribs on two sides, D. All
C: Four ribs on two sides
Answer: C: Four ribs on two sides 
Explanation: Ans. Four ribs on two sides