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: Biochemistry
The combination of main supporting enzyme is called 
Select and explain. 
A. Apoenzyme, B. Coenzyme, C. Holoenzyme, D. Constitutive enzyme
C: Holoenzyme
Answer: C: Holoenzyme 
Explanation: None