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
Shunting effect occurs in complete dentures: 
Select and explain. 
A. If occlusal plane is lower in molar area, B. If the occlusal plane is lower in incisor area, C. If occlusal plane is lower in molar as well as incisor area, D. When patient has poor muscular co-ordination
C: If occlusal plane is lower in molar as well as incisor area
Answer: C: If occlusal plane is lower in molar as well as incisor area 
Explanation: A tipped occlusal plane will result in a shunting effect and loss of stability. That is, if the occlusal plane is lower in the molar area, there will be a tendency for the upper denture to be displaced posteriorly and the lower denture to be displaced anteriorly.