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: Forensic Medicine
Mechanism of cyanide poisoning is by inhibiting: NEET 13 
Select and explain. 
A. DNA synthesis, B. Cytochrome oxidase, C. Protein breakdown, D. Protein synthesis
B: Cytochrome oxidase
Answer: B: Cytochrome oxidase 
Explanation: Ans. Cytochrome oxidase