This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Medicine
iloprost used in pulmonary hypeension 
Select and explain. 
A. Inhalation, B. Intravenous, C. Oral, D. Subcutaneous
A: Inhalation
Answer: A: Inhalation 
Explanation: Pulmonary hypeension is incurable but new treatments have delivered significant improvements in exercise performance, symptoms and prognosis. Allpatients should be anticoagulated with warfarin, and oxygen, diuretics and digoxin prescribed as appropriate. Specific treatment options include high-dose calcium channel blockers, prostaglandins such as epoprostenol (prostacyclin) or iloprost therapy inhalation , the PDE5 inhibitor sildenafil, and the oral endothelin antagonist bosentan. ref:davidsson&;s principles and practices medicine,21 st ed,pg no 702