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
Which one is a contraindication to the use of ergot derivatives : 
Select and explain. 
A. Migraine, B. Hyperprolactinemia, C. Obstructive vascular disease, D. Postpartum hemorrhage
C: Obstructive vascular disease
Answer: C: Obstructive vascular disease 
Explanation: None