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: Pediatrics
A newborn baby develops cyanosis on day three of life. On auscultation, there is a systolic murmur. Echocardiography reveals a cyanotic hea disease in the baby. Which one of the following drugs can be administered to prolong the life of the baby pending intervention ? 
Select and explain. 
A. Indomethacin, B. Ibuprofen, C. Prostaglandin E1, D. Propanolol
C: Prostaglandin E1
Answer: C: Prostaglandin E1 
Explanation: PGE1 help to reduce cyanosis in selected cases by keeping PDA open. Ref : Ghai essential of pediatrics, eighth edition, p.no:425