<prompt> Enzyme deficiency in McArdles syndrome?Acid maltaseMuscle phosphorylaseLiver debranching enzymeBranching enzyme  <response>: Type name Enzyme Deficiency Clinical Features V Myophosphorylase deficiency, McArdles syndrome Muscle phosphorylase Poor exercise tolerance Muscle glycogen abnormally high 2.5-4 Blood lactate very low after exercise Reference: Harper; 30th edition; Table: 18-2; Page no: 179 