ANS:B - CMC

Carboxymethyl cellulose (CMC) is not an explosive. TNT (Trinitrotoluene), RDX (Research Department Explosive), and lead azide are all explosives, used for various purposes such as military applications, mining, and demolition. CMC, on the other hand, is a cellulose derivative commonly used as a thickening agent, stabilizer, or binder in various industries including food, pharmaceuticals, and cosmetics. It does not possess explosive properties.