What is the Doppler pattern in patients with severe right ventricular dysfunction and tricuspid regurgitation?

The type I pattern is seen with mild to moderate right ventricular dysfunction.
The type II pattern is seen with severe right ventricular dysfunction and tricuspid regurgitation.
The type III pattern is seen with severe right ventricular dysfunction and pulmonary hypertension.
The type IV pattern is seen with severe right ventricular dysfunction and is usually accompanied by severe tricuspid regurgitation.
a) I and II are correct.
b) II and IV are correct.
c) III and IV are correct.
d) I and III are correct.