If the coefficients of $x^{7}$ in $\left(ax^{2} + \frac{1}{2bx}\right)^{11}$ and $x^{-7}$ in $\left(ax - \frac{1}{3bx^{2}}\right)^{11}$ are equal, then (1) $729ab = 32$ (2) $32ab = 729$ (3) $64ab = 243$ (4) $243ab = 64$
If the coefficients of $x^{7}$ in $\left(ax^{2} + \frac{1}{2bx}\right)^{11}$ and $x^{-7}$ in $\left(ax - \frac{1}{3bx^{2}}\right)^{11}$ are equal, then\\
(1) $729ab = 32$\\
(2) $32ab = 729$\\
(3) $64ab = 243$\\
(4) $243ab = 64$