<prompt> Both Vitamin K and C are involved inThe synthesis of clotting factorsPost translational modificationsAntioxidant mechanismsThe microsomal hydroxylation reactions  <response>: Vitamin C plays the role of a coenzyme in the hydroxylation of proline and lysine while procollagen is conveed to collagen i.e. post-translational modification. The functions of vitamin K are concerned with the blood clotting process. It brings about the posttranslational after protein biosynthesis in the cell modification of ceain blood clotting factors ii, vii, ix, x ref Satyanarayana 4th ed page 130, 132 