Pharmacology All of the following statements are true except ? A PG's and leukotriences are derived from arachidonic acid B Cox-I is an inducible enzyme C Cox II is induced by cytokines at sites of inflammation D Leukotrienes cause smooth ms. constriction 💡 Explanation All of the following statements are true except ? ✓ Correct Answer: B. Cox-I is an inducible enzyme