A. 21x2+21y2+21z2-34x-76y+90z-2=0

B. 21x2-21y2+21z2-34x-76y+90z-2=0

C. 21x2+21y2+21z2-34x+76y+90z+2=0

D. 21x2-21y2-21z2-34x-76y+90z-2=0

The locus of the point if the join of the points (-4,2,3), (2,-1,5) subtends a right angle at P is

The centroid of the tetrahedron formed by the points(3,2,5), (-3,8,-5), (-3,2,1),(-1,4,-3) is

In ABC where A(4,5,6), B(3,2,1), C(5,4,3), if p,q,r are lengths of the medians through A,B,C then ascending order of p,q,r is

A plane passes through (2, 3, -1) and is perpendicular to the line having direction ratios ( 3, -4, 7). The perpendicular distance from the origin to this plane is

The ratio in which (5,4,-6) divides the line segment joining (3,2,-4),(9,8,-10) is