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
In case of hepatic porphyria the safe anti convulsant- 
Select and explain. 
A. Phenytoin, B. Carbamazepine, C. Valparate, D. Paraldehyde
D: Paraldehyde
Answer: D: Paraldehyde 
Explanation: None