A.Just “LK” is an ambiguous way of referring to a geometric figure without proper notation. It doesn't clearly specify whether it's a line, line - segment, or ray, so this is not a correct answer.
B.: This is the notation for a line segment. A line segment has two endpoints. In the given figure, the endpoints are and , and the order of the endpoints in the notation doesn't matter in terms of representing the segment between the two points. So,
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