Question

Through any two points there is/are exactly ________ line(s).

Answer 1

one. that is the definition of a line.
Through any two points, there is exactly one line.

Answer 2

Answer: Only one line is the correct answer.

Explanation:

Through any two points, there is exactly 1 line segment.

As the definition of line states that line segment has exactly two end points.

And postulate (3) of Euclid states that through any two points there is exactly one line.

And it can't be extended to any limit,

As it has only two end points.

Hence, only one line is the correct answer.