**Core Concept**
Amylo-alpha-1,6-glucosidase, also known as debranching enzyme, is a crucial enzyme in glycogen metabolism. It catalyzes the hydrolysis of alpha-1,6-glycosidic bonds in glycogen, allowing for the breakdown of glycogen to glucose-1-phosphate. This step is essential for glycogenolysis, particularly in the liver and kidneys.

**Why the Correct Answer is Right**
The debranching enzyme works in conjunction with glycogen phosphorylase to break down glycogen. It recognizes the alpha-1,6-glycosidic branch points in glycogen and cleaves the branch, releasing a glucose molecule. This process is vital for the continued breakdown of glycogen, as glycogen phosphorylase cannot access the interior of the glycogen molecule. The debranching enzyme is also necessary for the proper functioning of the glycogen storage diseases, particularly type III.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not specify an enzyme involved in glycogen metabolism.
**Option B:** This option is incorrect because it is not a correct description of a debranching enzyme.
**Option C:** This option is incorrect because it is not related to glycogen metabolism.

**Clinical Pearl / High-Yield Fact**
The debranching enzyme is essential for glycogenolysis, particularly in the liver and kidneys. Deficiencies in this enzyme can lead to glycogen storage disease type III (Cori's disease), characterized by hypoglycemia, muscle weakness, and liver enlargement.

**Correct Answer: C. Amylo-alpha-1,6-glucosidase**