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
The color code for the "Regular" size pins in the TMS (Thread Mate System) pins system is 
Select and explain. 
A. Gold, B. Silver, C. Pink, D. Red
A: Gold
Answer: A: Gold 
Explanation: The Thread Mate System (TMS) pins