For the equation to represent the hyperbola $\large\frac{x^2}{9-\lambda}+\frac{y^2}{6-\lambda}$$=1$ what should be the value of $\lambda$?

Question

$\begin{array}{1 1}(a)\;\lambda \in (6,9)\\(b)\;\lambda \in (4,3)\\(c)\;\lambda \in (3,9)\\(d)\;\lambda \in (2,4)\end{array}$