<prompt> The immediate precursor of mevalonic acid isMevalonyl CoAMevalonyl pyrophosphateAcetoacetyl CoABeta hydroxy-beta methyglutaryl CoA  <response>: Beta-hydroxy beta-methyl glutaryl CoA HMG CoA. The reduction of HMG CoA to mevalonate is catalysed by HMG CoA reductase. It is a microsomal endoplasmic reticulum enzyme.Ref: DM Vasudevan - Textbook of Biochemistry, 8th edition, page no: 148 