This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Ergot alkaloid commonly used to prevent postpartum hemorrhage is : 
Select and explain. 
A. Methylergometrine, B. Ergotamine, C. Dihydroergotamine, D. Dihydroergotoxine
A: Methylergometrine
Answer: A: Methylergometrine 
Explanation: Methylergometrine (methergine) is administered during delivery of anterior shoulder to prevent postpartum hemorrhage.