<prompt> Complement formed in liver -C2,C4C3,C6,C9C5,C8C1  <response>: - 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 panikers 9th edition, pg no:126 p 