<prompt> The similarity between Vit C Vit K isBoth help in conversion of proline to hydroxyprolineBoth help in post-translational modificationBoth have anti infective activityBoth are involved in coagulation cascade  <response>: Both vitamin C and vitamin K are required for post-translational modification.Vitamin C is required for post-translational modification of proline and lysine in collagen synthesis.Vit K is required for post-translational modification of glutamate residue for generation of clotting factors. 