Muscle phosphorylase deficiency leads to which glycogen storage disorder?

Muscle phosphorylase deficiency leads to Mc Ardle's disease. which is characterised by poor exercise tolerance, muscle glycogen being abnormally high and blood lactate level very low after exercise. Mnemonic Her's disease - Hepatic phorphorylase Andersen disease - Branching enzyme Cori's disease - Debranching enzyme. Mnemonic A for B, C for D