<prompt> Which of the following is a phytosterol?SitosterolCholesterolErgosterolCalcitriol  <response>: Sterols are molecules with the cyclopentano-perhydro-phenanthrene CPP nucleus Sitosterol Plant phyto sterol Ergosterol Fungal myco sterol Cholesterol Animal zoo sterol Plant sterols sitosterol absorption of cholesterol Sitosterolemia Autosomal recessive disorder Defects in either ABCG5 or ABCG8 Plant sterol levels Xanthomas Atherosclerosis 