If the dot product of two vectors (X and Y) is zero, then which of the following conditions is TRUE?

Explanation

The correct answer is that the vectors are orthogonal to each other. The dot product of two vectors is zero when the angle between them is 90 degrees, meaning they are perpendicular. Option A is incorrect because opposite vectors would have a negative dot product if they are not zero vectors. Option B is incorrect because parallel vectors (when not zero) have a non-zero dot product. Option D is incorrect because while a null vector would result in a zero dot product with any other vector, the question context suggests orthogonality.