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.

In an ideals (A)phase of history, Bharat had the ruler(B) Chandragupta of the Gupta dynasty trying(C) to unify the people (D)of his huge empire through extraordinary(E).