Best antihypeensive drug in pulmonary hypeension is

Among the given drugs only to drugs that is bosentan and amilodipine are indicated in pulmonary hypeension. Calcium channel blockers like amlodipine are indicated only in those patient who are positive for intravenous vasodilator challenge (less than 5% patient ). The patient is negative then endothelin drugs are indicated like ok Bosenton. Refer Harrison 19e p1659