Question

Two lines are parallel to each other, only when (a) They do not intersect each other when extended on either side (b) The lines lie on the same plane (c) They are parallel to the plane in which they lie (d) Their point of intersection is a unique point​

Answer 1

Answer:

(a). They do not intersect each other when extended on either side

Step-by-step explanation:

it is the most important factor for parallel line. Except this no other factor matters.

hope it helps.