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
[{'content': 'IF4F include all except \nSelect and explain. \nA. 4A, B. 4G, C. 4E, D. 4S', 'role': 'user'}, {'content': 'Answer: D \nExplanation: IF 4F consist of 4A, 4G, 4E subunits.', 'role': 'assistant'}]