Correct option (d) concurrent lines
Explanation:
P1 = P2 = 0, P2 = P3 = 0 and P3 = P1 = 0 are lines of intersection of the three planes P1 , P2 and P3 .
As vector n1 ,n2 and n3 are non-coplanar, planes P1 , P2 and P3 will intersect at unique point. So the given lines will pass through a fixed point.