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 strength attained by amalgam within 24 hours is: 
Select and explain. 
A. More than 60%, B. More than 70%, C. More than 80%, D. More than 90%
D: More than 90%
Answer: D: More than 90% 
Explanation: The strength attained by amalgam within 24 hours is more than 90%.
Reference: Marzouk Operative dentistry, pg-111