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 function of a reservoir in a sprue is to avoid: 
Select and explain. 
A. Localised shrinkage porosity, B. Microporosity, C. Generalised porosity, D. None of the above
A: Localised shrinkage porosity
Answer: A: Localised shrinkage porosity 
Explanation: None