This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nose and PNS, Subject name: ENT
In Chevallet fracture of nasal septum the mechanism of trauma is: 
Select and explain. 
A. Blow from above, B. Blow from below, C. Blow directly from front, D. Any of the above
B: Blow from below
Answer: B: Blow from below 
Explanation: (b) Blow from below(Ref. Scott Brown, 8th ed., Vol 3; 1127)Blow directly from front will cause Jarjavay fracture.Blow from side may depress only one nasal bone. Side force can cause severe septal displacement, which can twist or buckle the nose.