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
Bucco-lingual width of posterior teeth should be 
Select and explain. 
A. Equal to the width of the natural teeth they replace, B. Greater than the width of the natural teeth they replace, C. Lesser than the width of the natural teeth they replace, D. Width of artificial posterior teeth is a matter of operator's preference
C: Lesser than the width of the natural teeth they replace
Answer: C: Lesser than the width of the natural teeth they replace 
Explanation: None