Q21.


21. The set of value of x for which $\log { }_{-4{\mathrm{x}}^2+12\mathrm{x}-8}\left|4\mathrm{x}-5\right|>0 \mathrm{is}$
$$\begin{gathered} \left(\mathrm{A}\right) \left(1,5/4\right)\cup \left(5/4,3/2\right) \left(\mathrm{B}\right) \left(1,\frac{3}{2}\right)\cup \left(\frac{3}{2},2\right) \\ \left(\mathrm{C}\right) \left(1,5/4\right) \left(\mathrm{D}\right) \left(\frac{3}{2},\frac{7}{4}\right) \end{gathered}$$