# Which one of the following is used in making explosives?

$\begin{array}{1 1}(a)\;\text{Natural rubber}\\(b)\; \text{Cellulose nitrate}\\(c)\;\text{ Valcanized rubber}\\(d)\;\text{Teflon}\end{array}$

Gun cotton is cellulose nitrate which is a semisynthetic polymer is used in making explosives.
Hence (b) is the correct answer.