<prompt> Glycogen storage disorder due to muscle phosphorylase deficiencyMcardles diseasePompes diseaseAndersens diseaseTaruis disease  <response>: McArdle;s disease: type V glycogen storage disease.Due to deficiency of muscle phosphorylase. Incidence 1 out of 1million.Ref: DM Vasudevan, 7th edition, page no: 144 