<prompt> Muscle phosphorylase deficiency leads to which glycogen storage disorderHers diseaseMcArdles diseaseCoris diseaseAndersen disease  <response>: Muscle phosphorylase deficiency leads to McArdles disease. Mnemonic M for M which is characterised by poor exercise tolerance, Muscle glycogen being abnormally high and blood lactate level very low after exercise.MnemonicHeris disease - Hepatic phosphorylaseAndersen disease - Branching enzymeCoris disease - Debranching enzyme. 