RRB Group-D Model Paper 15 with answers for online practice

Option (A):
2x (x + 4) – 11 = x (x - 3) + 6
$2{\mathit{x}}^2+8\mathit{x}\mathit{–}11={\mathit{x}}^2\mathit{–}3\mathit{x}+6$
${\mathit{x}}^2+11\mathit{x}\mathit{–}17=0\mathit{t}$ his is a quadratic equation
Option (B):
4x (x + 4) – 11 = 5x (x – 3) + 5
$4{\mathit{x}}^2+16\mathit{x}\mathit{–}11=5{\mathit{x}}^2\mathit{–}15\mathit{x}+5$
${\mathit{x}}^2\mathit{–}31\mathit{x}+6=0$ this is a quadratic equation
Option (C):
x (x + 2) - 15 = x (x - 5) + 11
${\mathit{x}}^2+2\mathit{x}\mathit{–}15={\mathit{x}}^2\mathit{–}5\mathit{x}+11$
7x – 26 = 0 this is not a quadratic equation
So option C is the answer