<prompt> NAD reduced by all of the following enzymes except:Alpha ketoglutarate dehydrogenaseIso-citrate dehydrogenaseMalate dehydrogenaseSuccinyl dehydrogenase  <response>: Ans. D. Succinyl dehydrogenaseNiacin acts as electron acceptor for the following enzymes:Isocitrate dehydrogenaseAlpha ketoglutarateMalate dehydrogenase 