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
During orthodontic movement of maxillary central Incisor, centre of rotation is present at apex. It shows: 
Select and explain. 
A. Controlled tipping, B. Uncontrolled tipping, C. Translation, D. Intrusion
A: Controlled tipping
Answer: A: Controlled tipping 
Explanation: Different Types of Orthodontic Tooth Movements
TIPPING:-
Simplest tooth movement.
Controlled tipping – Centre of rotation at its apex.
Uncontrolled tipping – Centre of rotation is very close or at centre of resistance.