about to only mathematics

Options

A. parallel lines
B. coplanar lines
C. coincident lines
D. concurrent lines

Answer

d

Explanation

`P_(1)=P_(2)=0 ,P_(2)=P_(3)=0andP_(3)=P_(1)=0` are lines of intersection of the three plane `P_(1)=P_(2)andP_(3)`.
As `vecn_(1),vecn_(2)andvecn_(3)` are non-coplanar, plane `P_(1),P_(2)andP_(3)` will intersect at unique point. So the given lines will pass through a fixed point.