If the straight lines intersect at a point, then the integer is equal to:
Explanation of correct option.
Let is the equation of the line passing through the point .
And let is the equation of the line passing through the point .
Let be a line passing through the points and .
So, the direction cosines of is given by
As passes through and and and intersect at a point.
Therefore, , and are coplanar
Therefore,
Hence, Option (B) is correct.