Question:
Mark against the correct answer in each of the following:
The equation of the plane passing through the points $\mathrm{A}(2,2,1)$ and $\mathrm{B}(9,3,6)$ and perpendicular to the plane $2 x+6 y+6 z=1$, is
A. $x+2 y-3 z+5=0$
B. $2 x-3 y+4 z-6=0$
C. $4 x+5 y-6 z+3=0$
D. $3 x+4 y-5 z-9=0$
Solution:
