A patient was administered a chemical agent called Guanfacine hydrochloride after the patient showed the symptoms like shortness of breath and headache. Guanfacine hydrochloride is a known stimulant of central $$\alpha_2$$-adrenergic receptors of the medulla regulating the sympathetic nervous system. The patient in this case must be suffering from

A

Hypertension

B

Hyperstimulation

C

Hyperpolarization

D

None of the above