Vishnu, remember that the question is asking which MUST be true. You are correct that (B) is true for those particular values. But, for other values of x and y, (B) is not true. For example, if x = -5, and y = -1, then (B) is NOT true. The correct answer is true for ALL valid values of x and y. (E) is the only answer choice.
For this one, we are trying to find out "which of the following inequalities MUST be true." This means that we need a choice that works for all possible values, not just one. If the question asked us for values that COULD be true, then we would only need one correct example.
2 Explanations