This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pharmacology
Riociguat is used for 
Select and explain. 
A. Pulmonary hypeension, B. Myocarditis, C. Atrial fibrillation, D. Stroke
A: Pulmonary hypeension
Answer: A: Pulmonary hypeension 
Explanation: Used for Chronic-thromboembolic pulmonary hypeension (CTEPH) and Pulmonary aerial hypeension (PAH) It is a stimulator of soluble guanylate cyclase (sGC). Ref: KD Tripathi 7th ed