Given below are two statements:
Statement I: Calcitonin and parathormone regulate the homeostasis of blood calcium levels.
Statement II: Insulin and glucagon regulate the homeostasis of blood glucose levels.
In the light of the above statements, choose the most appropriate answer from the options given below.

When blood calcium levels are high, calcitonin lowers blood calcium levels. When blood calcium levels are low, parathormone increases blood calcium levels. Thus, these two hormones help maintain homeostasis of blood calcium levels. When blood glucose levels are low, glucagon increases blood glucose levels. When blood glucose levels are high, insulin lowers blood glucose levels. Thus, these two hormones help maintain homeostasis of blood glucose levels.