In which scenarios is Glucagon commonly used?

Glucagon is primarily utilized in emergency scenarios to counteract hypoglycemia, particularly in individuals who are unconscious or unable to ingest glucose orally. When blood sugar levels drop significantly, glucagon promotes the release of glucose stored in the liver, effectively raising blood sugar levels to a safe range.

Additionally, while not its primary indication, glucagon can also aid in the management of anaphylaxis as it has the potential to relax smooth muscle and may alleviate severe bronchospasm associated with anaphylactic reactions. However, it is essential to note that epinephrine is the first-line treatment for anaphylaxis. The use of glucagon in this context is more of an adjunctive role rather than the main therapeutic agent.

The other scenarios presented are not typical indications for glucagon. For instance, hypertension and angina are addressed through different classes of medications targeting cardiovascular functions. Dehydration and electrolyte imbalance require fluid and electrolyte management rather than glucagon. Chronic liver disease and sepsis involve complex pathophysiological processes that do not involve glucagon as a therapeutic agent. Therefore, B is indeed the most suitable answer regarding the primary uses of glucagon in clinical practice.