Which of the following drugs has the lowest total body clearance ? Digoxin (half life 40 hr, Vd 7 L/kg), lidocaine (half life 1.5 hr, Vd 1.3 L/kg), procainamide (half life 3 hr, Vd 1.9 L/kg) and propranolol (half life 4 hr, Vd 5 L/kg).