Coris disease is due to defect in: (A) Branching enzyme, (B) Debranching enzyme, (C) Myophosphorylase, (D) Hepatic phosphorylase
Answer is B. It is type III glycogen storage disease. to deficiency of the debranching enzyme. Clinical features: highly branched dextrin accumulate, fasting hypoglycemia, hepatomegaly.Ref: DM Vasudevan, 7th edition, page no: 125