<prompt> Which of the following is not steroid?EstrogenCholic acidLeukotriansVitamin D  <response>: Leukotrienes are a family of inflammatory mediators produced in leukocytes by the oxidation of arachidonic acid AA and the essential fatty acid eicosapentaenoic acid EPA by the enzyme arachidonate 5-lipoxygenase.Ref: DM Vasudevan, 7th edition, page no: 190 