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 following property of saliva affect denture retention? 
Select and explain. 
A. Quality & Quantity of serous & mucous saliva, B. Quantity of mixed saliva, C. Quantity of only serous saliva, D. None of the above
A: Quality & Quantity of serous & mucous saliva
Answer: A: Quality & Quantity of serous & mucous saliva 
Explanation: None