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: Medicine
Drugs used for Prophylaxis of migraine include the following except? 
Select and explain. 
A. Sumitriptan, B. Valproate, C. Serotonergic drugs, D. TCAs
A: Sumitriptan
Answer: A: Sumitriptan 
Explanation: None