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
The disadvantage of three fourth crown 
Select and explain. 
A. Compromised esthetics, B. More tooth reduction, C. Inadequate retention, D. Biomechanical compatibility
C: Inadequate retention
Answer: C: Inadequate retention 
Explanation: None