Which of the following is the correct formula for the cyanide ion?

Cyanide is a highly toxic polyatomic ion formed by a carbon atom triple-bonded to a nitrogen atom. Despite its toxicity, cyanide is utilized in several industrial processes, including gold mining, where it helps in extracting gold from ores, and in electroplating, where it is used for depositing metals onto surfaces. The danger associated with cyanide stems from its ability to inhibit cellular respiration by binding to cytochrome c oxidase in mitochondria, preventing oxygen utilization.