This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
[{'content': 'Complement synthesis by liver is? \nSelect and explain. \nA. C1, B. C5, C. C3, D. C4', 'role': 'user'}, {'content': "Answer: C \nExplanation: Complement is a complex of nine different fractions, C1 to C9. They are synthesised at various sites in the body. The complement C3, C6, C9 are synthesised in liver. Reference : Anathanarayan & paniker's 9th edition, pg no:126 <\\p>", 'role': 'assistant'}]