In each question, one sentence is given in which certain words are in bold and numbered from A to E. Below the sentence are given five options with possible pairs of interchange of those bold words. Choose the pair(s) of words which are needed to be interchanged to make the sentence grammatically correct and meaningful.

Newton’s discovery (A)of gravity has been invoked (B)as an apt example (C) for achieving thinking (D)unattainable goals through creative  seemingly(E).