Counter-Regulatory Hormones to Insulin

Hormones play a crucial role in regulating various physiological processes in the human body. Among these hormones, insulin is particularly important for glucose metabolism. Diabetes mellitus is a common endocrine disorder characterized by insufficient insulin production or action. In patients with diabetes, fluctuations in blood glucose levels can lead to significant complications if not managed properly.

Which of the following hormones has a counter-regulatory effect to insulin's action, thereby increasing blood glucose levels?