If the $\;10^{th}\;$ term of a $GP$ is $9$ and the $\;4^{th}\;$ term is $4$, then the $\;7^{th} \;$term is

Question

$(a)\;\frac{9}{4}\qquad(b)\;7\qquad(c)\;6\qquad(d)\;\frac{4}{9}$