The correct option is option (d) 2
it is given that 
![\[\begin{aligned} &\Rightarrow\left(\frac{-5}{2}\right)^{2}-\frac{k}{2}=\frac{21}{4} \\ &\Rightarrow \frac{25}{4}-\frac{k}{2}=\frac{21}{4} \\ &\Rightarrow \frac{k}{2}=\frac{25}{4}-\frac{21}{4}=\frac{4}{4}=1 \\ &\Rightarrow \mathrm{k}=2 \end{aligned}\]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-db37c3cfed83c7344e4f1b437343e787_l3.png "Rendered by QuickLaTeX.com")
If 
The correct option is option (d) 2
it is given that
