Match the following list of bioactive substances and their roles:
Bio active SubstanceRole(i) Statin(a) Removal of oil stains(ii) Cyclosporin A(b) Removal of clots from blood vessels(iii) Streptokinase(c) Lowering of blood cholesterol(iv) Lipase(d) Immuno−suppressive agent
i-c, ii-d, iii-b, iv-a