The sum of angles at a point is equal to:
Explanation for the correct option:
Option C:
Explanation for the incorrect options:
Option A:
At a point, there are no lines or line segments so the sum of the angles cannot be .
Option B:
At a point, there are no lines or line segments so the sum of the angles cannot be .
Option D: none of these
Since the sum is , option C satisfies and this option cannot be correct then.
Hence, the correct option is (C).