Best anti hypertensive in pulm hypertension patient would be? CCB or Bosentan?

Best anti hypertensive in pulm hypertension patient would be? CCB or Bosentan?

Look at the flow chart for PAH treatment.

If nitric oxide test +ve, then CCB - nifedipine; which is also the best anti-hypertensive in PAH.

If the test in negative, then for stage II and III, Bosentan is DOC and for stage IV it is epoprostenol.

The answer is CCB.