Answer 18

18.  Answer D is the correct answer.  With extreme right axis deviation, there is a negative deflection of the QRS complex is leads I and avF.  With a right axis deviation, there is a negative deflection in lead I and a positive deflection in lead avF.  With a normal axis, there is a positive deflection in leads I and avF.  With a left axis deviation, there is a positive deflection in lead I and a negative deflection in lead avF.