Geometry

Question Analysis

This question involves the concept of skew lines in geometry. The main focus is on understanding the characteristics and definitions of skew lines.

Key Concept Explanation:

Skew lines are defined as non-coplanar lines, meaning they do not lie in the same plane, and they do not intersect each other.

Option Analysis

Option C describes lines that cannot be skew. These lines are coplanar. They cannot be skew (they must either intersect or be parallel).

The other options can be skew:

Option A: These lines are in different planes (floor and ceiling). They can be skew if they are not parallel (e.g., a diagonal line on the floor and a different diagonal line on the ceiling).

Option B: These lines are in different planes (wall and floor). They can be skew if they do not int...