Answer:
Option C
Explanation:
Given, 5x+y-1=0 coincides with one of the line given by 5x2+xy-kx-2y+2=0
On putting the value of y=-5x+1 in the above equation,
We get
$5x^{2}+x(-5x+1)-kx-2(-5x+1)+2=0$
$\Rightarrow $ $5x^{2}-5x^{2}+x-kx+10x-2+2=0$
$\Rightarrow $ x-kx+10x=0
$\Rightarrow $ 11x-kx=0
$\Rightarrow $ 11-k=0
$\Rightarrow $ k=11
