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
A technique of transforming two fluid (or paste-like) materials into a homogeneous mixture without mechanical stirring is known as: 
Select and explain. 
A. Static mixing, B. Rheology, C. Dynamic mixing, D. Mixing time
A: Static mixing
Answer: A: Static mixing 
Explanation: Static mixing — A technique of transforming two fluid (or paste-like) materials into a homogeneous mixture without mechanical stirring; it requires a device that forces two streams of material into  a mixer cylinder, such that as the streams move through the mixer, while the stationary elements in the mixer continuously blend the materials.
Key Concept
A technique of transforming two fluid (or paste-like) materials into a homogeneous mixture without mechanical stirring is called static mixing.
Ref: Phillip’s Science of Dental Materials ed 12 pg 152