This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
The only FDA approved therapeutic use of Endothelium-Derived Relaxing Factor is 
Select and explain. 
A. Pulmonary hypeension in newborn, B. Primary pulmonary hypeension, C. Congestive cardiac failure, D. Essential hypeension in newborn
A: Pulmonary hypeension in newborn
Answer: A: Pulmonary hypeension in newborn 
Explanation: EDRF is also called nitric oxide. The only approved use is vasodilatation in Pulm.HTN in newborn Ref: Goodman Gillman 12thedPg 1059