From the given alternatives, according to dictionary, which word will come at LAST position?

First letter of all the words are same so verifying the second letter.

The alphabetical order of second letters of the words is i, p, r. Arranging them respectively, Orderly and Ordinary are placed at last two positions.

The alphabetical order of fourth letter of Orderly and Ordinary is e, i. Arranging them respectively, Orderly is placed third and Ordinary is placed fourth.

$$\therefore\ $$Ordinary will come at last position according to dictionary.

Hence, the correct answer is Option D