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: Pathology
[{'content': 'Complement proteins constitute what percentage of serum proteins ? \nSelect and explain. \nA. <1, B. 5-Jan, C. 5-10%, D. >10%', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Answer- C. 5-10%The complement system consists of alarge number of proteins that together constitute about 10% of the total circulating serum protein.', 'role': 'assistant'}]