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
Material causing minimum tissue distortion is: 
Select and explain. 
A. Polysulphide, B. Silicone, C. Impression plaster, D. Zinc oxide eugenol paste
C: Impression plaster
Answer: C: Impression plaster 
Explanation: Impression plaster is a β-calcium sulfate hemihydrate used at a water/powder ratio of approximately 0.5 to 0.6. Its fluidity makes it suitable for making impressions of soft tissues in the uncompressed state, a characteristic of mucostatic impression material.
Ref: Phillip’s Science of Dental Materials ed 12 pg 177