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 main disadvantage of metal ceramic restoration as
compared to porcelain jacket crown is 
Select and explain. 
A. Less strength, B. Poor colour matching, C. More porous, D. Less retentive
B: Poor colour matching
Answer: B: Poor colour matching 
Explanation: None