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: Dental
In "Jiggling type" of trauma, the occlusal force cause 
Select and explain. 
A. Funnel shaped destruction of socket wall, B. Distinct pressure and tension sides within periodontal Ligament, C. No changes in socket wall, D. Has no effect on periodontal ligament space
A: Funnel shaped destruction of socket wall
Answer: A: Funnel shaped destruction of socket wall 
Explanation: None