What is the role of enzyme acid alpha-glucosidase in the human body, and its deficiency leads to which disease?

A Breakdown of glycogen, leading to Pompe disease ✓
B Synthesis of glycogen, leading to McArdle's disease
C Degradation of branched-chain amino acids, leading to Maple syrup urine disease
D Metabolism of fatty acids, leading to Carnitine palmitoyltransferase deficiency

Explanation

Acid alpha-glucosidase is an enzyme responsible for breaking down glycogen, and its deficiency leads to the accumulation of glycogen in muscles, causing Pompe disease.

Source

NCBI Gene Review
Enzymes in Disease Biochemistry Lysosomal Storage Diseases Medium MEDICAL Confidence: high