Which of the following is an odor MWDs are trained on?

• A. Graphite
• B. Petrol
• C. Sodium chlorate
• D. Water

Answer: (C)

The idea is that for explosive-detection work, dogs are trained to recognize specific explosive-related scents so they can reliably alert in the field. Sodium chlorate is used as a training odor because it’s a stable, identifiable odor tied to oxidizer components found in some improvised explosive formulations. Using a standardized odor like this helps handlers condition the dog to alert to a real-world target while keeping training safe and controlled.

Graphite, petrol, and water don’t fit the standard odor cues used for explosive detection in typical MWD training. Graphite isn’t a common explosive odor cue, petrol is a fuel smell not directly tied to many explosive formulations in training, and water has no detectable odor. So sodium chlorate is the best fit among these options.