The correct option is B Pancreas
The hormone that causes the liver to break down glycogen is known as Glucagon. This hormone is released by the pancreas into the blood stream when the concentration of glucose in the blood stream becomes low. The pancreas is a glandular organ located in the
upper abdomen and serves both as an exocrine gland and endocrine gland. As an endocrine gland, this organ secretes hormones such as
glucagon and insulin to control blood sugar levels of the human body system. Thus, the correct answer is option B.