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
Angles between Adhesive and Adherent is Zero degree, it indicates: 
Select and explain. 
A. Complete wetting of surfaces, B. Rough surfaces between Adhesive & Adherent, C. Adherent and adhesive molecules are tangent to each other, D. Irregularities present between Adherent surfaces
A: Complete wetting of surfaces
Answer: A: Complete wetting of surfaces 
Explanation: None