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 a 3-D curve: 
Select and explain. 
A. Curve of spee., B. Anti monsoon curve., C. Monsoon curve.., D. None.
C: Monsoon curve..
Answer: C: Monsoon curve.. 
Explanation: Monsoon’s curve

3-D curve
Spherical in shape
Center – Glabella
Radius – 8”
Surface of phase is thought or said to pass through the occlusal plane including the condyle.