for every point `(x,y,z)` on the y-axis: (A) `x=0,y=0` (B) `x=0,z=0` (C) `y=0,z=0` (D) `y!=0,x=0,z=0`

The equation of y-axis are (A) x=0,y=0 (B) x=0,z=0 (C) y=0,z=0 (D) none of these

For every point P(x ,\ y ,\ z) on the xy-plane, a. x=0 b. y=0 c. z=0 d. x=y=z=0

The equation of the righat bisecting plane of the segment joiningteh points (a,a,a) and (-a,-a,-a),a!=0 is (A) x+y+z=a (B) x+y+z=3a (C) x+y+z=0 (D) x+y+z+a=0

The equation of the plane containing the line 2x+z-4=0 nd 2y+z=0 and passing through the point (2,1,-1) is (A) x+y-z=4 (B) x-y-z=2 (C) x+y+z+2=0 (D) x+y+z=2

The equation of the plane containing the line 2x+z-4=0 nd 2y+z=0 and passing through the point (2,1,-1) is (A) x+y-z=4 (B) x-y-z=2 (C) x+y+z+2=0 (D) x+y+z=2

The equation of the plane passing through the intersection of the planes x+2y+3z+4=0a dn 4x+3y+2z+1=0 and the origin ils (A) 3x+2y+z+1=0 (B) 3x+2y+z=0 (C) 2x+3y+z=0 (D) x+y+z=0

Equation of the plane containing the straighat line x/2=y/3=z/4 and perpendicular to the lane containing the straighat lines x/3=y/4=z/2 and x/4=y/2=z/3 is (A) x+2y-2z=0 (B) 3x+2y-2z=0 (C) x-2y+z=0 (D) 5x+2y-4z=0

The angle between the lines 2x=3y=-z and 6x=-y=-4z is (A) 0^0 (B) 90^0 (C) 45^0 (D) 30^0

z=x+iy satisfies arg(z+2)=arg(z+i) then (A) x+2y+1=0 (B) x+2y+2=0 (C) x-2y+1=0 (D) x-2y-2=0

The equation of the plane thorugh the point (-1,2,0) and parallel to the lines x/3=(y+1)/0=(z-2)/(-1) and (x-1)/1=(2y+1)/2=(z+1)/(-1) is (A) 2x+3y+6z-4=0 (B) x-2y+3z+5=0 (C) x+y-3z+1=0 (D) x+y+3z-1=0