(c) Eminent - outstanding; Immanent - inherent/existing or operating within; Imminent - about to happen; Eminence - quality of being eminent; Imminence is the quality or condition of being about to occur. (i) is quite simple and clear. Eminent speaker or outstanding speaker. In (iii) imminent is the best choice with rain, which was about to happen. Out of Eminence and Imminence, the earlier one fits the bill in (iv) - quality of being outstanding in their respective fields. Inherent justice is the most suited usage in (ii), so Immanent is the correct choice.