Which inequality explains why these three segments cannot be used to construct a triangle?
ef + fd > de
ed + ef < df
ed + ef > df
ef + fd < de

Option B

Step-by-step explanation:

In a triangle, as per triangle conjecture, the sum of two sides will always be strictly greater than the third side

From the given four options,

we see that option B is inconsistent with this requirement

Hence option B is right answer.