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
IF4F include all except 
Select and explain. 
A. 4A, B. 4G, C. 4E, D. 4S
D: 4S
Answer: D: 4S 
Explanation: IF 4F consist of 4A, 4G, 4E subunits.