Which of the following patients is likely to be treated with IV Glucagon?

A. A young man with an overdose of cocaine who has a BP of 190/110 mm Hg

B. A middle aged man with Type II diabetes who has not taken his regular dose of Gliclazide for 4 days

C. An old man with severe bradycardia & hypotension due to ingestion of overdose of Atenolol

D. An old woman with lactic acidosis as a result of severe infection & shock