Q. Which of the following statements regarding ventricular tachycardia (ventricular dis arrhythmia) is true?

(a) Electrocardiography (ECG) is the criterion standard for the Diagnostic of VT
(b) Lidocaine hydrochloride (xylocaine) is a drug of choice
(c) Hypokalemia, hypomagnesemia, and hypocalcemia may predispose patient with VT
(d) all of the above