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
Ammonia treated gold foil is also known as: 
Select and explain. 
A. Cohesive foil, B. Noncohesive foil, C. Corrugated foil, D. Non corrugated foil
B: Noncohesive foil
Answer: B: Noncohesive foil 
Explanation: To make gold pellets, a piece of foil is placed in the palm and each end is folded towards the center. 
This incompletely formed pellet is transferred between thumb and index finger to form pellet. Rolled pellets can be stored in a gold foil box with cotton dipped in 18% ammonia (to prevent the formation of oxide layer on the pellets).

Nisha Garg, Amit Garg. Textbook of Operative Dentistry.  Edition 3. Page: 373