A.\(\left( P \right):\,\,\,x + y - z = 0\)
B.\(\left( \beta  \right):\,\,\,x + z = 0\)
C.\(\left( Q \right):\,\,\,x + y + 2z = 0\)
D.\(\left( \alpha  \right):\,\,\,x - y + 1 = 0\)