The right answer is A (They are opposed).
Insulin is a hypoglycemic hormone, which lowers the level of glucose in the blood.
To sum up, insulin:
* Brings glucose into cells for energy needs
* Stores the rest as glycogen to make reservations
* Once the full reserve turns everything into fat
Unlike insulin, glucagon is a hyperglycemic hormone (which increases the level of blood sugar) secreted by the pancreas; this time by the alpha cells of the islets of Langerhans. The hormone is produced in response to hypoglycemia caused by insulin (which I recall has lowered the level of glucose in the blood by entering the cells).
It therefore re-increases blood glucose with a reverse mechanism
