This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Forensic Medicine
All the following poisons act by inhibiting somebody enzymes, except Repeated 
Select and explain. 
A. Cyanide, B. Arsenic, C. Paramar, D. Zinc Phosphide
C: Paramar
Answer: C: Paramar 
Explanation: By exclusion . other poisons inhibit enzymes