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
Localised shrinkage porosity increases by 
Select and explain. 
A. Increase in sprue length, B. Increase in sprue diameter, C. Increase in mold temperature, D. Increase in melt temperature
A: Increase in sprue length
Answer: A: Increase in sprue length 
Explanation: None