I apologise for the caps, can you please help me locate the label? I can't seem to find it. I click on png and I just see the same figure

We are given a rectangle whose width is split into equal segments. Because the segments have equal widths, and each line starts and ends at the same height as the other, we know the line that spans more segments will be the longer one.
By looking at the diagram, we see that segment $B F$ spans 3 of the segments while segment $E A$ spans 4 of the segments. There is no further math needed; $E A$ must be longer than $B F$.
The correct answer is (B).

The figure of the problem is just that what you see sir

how do we know it's a rectangle with width in equal segments

Because the figure. It is a rectangle.

Even if it does not drwn the scale and could be the case of a square, a square is till a rectangle special case