This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Induction of Labour, Subject name: Gynaecology & Obstetrics
Prostaglandin in cervical ripening - 
Select and explain. 
A. PGE2, B. PGF 2 alpha, C. Carboprost, D. PGE4
A: PGE2
Answer: A: PGE2 
Explanation: Ans. is 'a' i.e., PGE 2 Methods of Cervical RipeningPharmacological MethodsNon Pharmacological MethodsProstaglandinsStripping of the membraneso Dinoprostone (PGE2) : gel, tablet, suppositoryo Misoprostol (PGE1) : tabletAmniotomyOxytocinMechanical.' osmotic dilators (laminaria)Progesterone receptor antagonistMifeprestone (RU 486)Transcervical balloon catheterReiaxin Hyaluronic acid Estrogen