The term independent of $x$ in the expansion of $(2x^2 - \frac{3}{x^3})^{15}$, is :

Question

( A ) $^{15}C_9\;2^5.3^7$
( B ) $^{15}C_9\;2^{10}.3^5$
( C ) $^{15}C_9\;2^{15}$
( D ) $^{15}C_9\;3^6.2^9$