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
Which of the following is related to occipital anchorage 
Select and explain. 
A. Intra oral force, B. Tipping a tooth, C. Extra oral force, D. Bodily movement of anchor
C: Extra oral force
Answer: C: Extra oral force 
Explanation: None