Arrange the following words in the sequence in which they occur in the dictionary: i. Optimistic ii. Opposition iii. Organization iv. Ordinary

Introduction / Context:
Here you must arrange four words beginning with the letter O in dictionary order. The trick is to pay attention not only to the first letter but to the sequence of the next few letters, especially where words share a common starting pattern. The choices are Optimistic, Opposition, Organization and Ordinary.

Given Data / Assumptions:
- Words to arrange: Optimistic, Opposition, Organization, Ordinary.
- Indices: i. Optimistic, ii. Opposition, iii. Organization, iv. Ordinary.
- Standard alphabetical order rules apply.

Concept / Approach:
First group words by the initial letters; then refine order by comparing subsequent characters. All of these words start with O, but quickly diverge into Op- and Or- groups. Within each group, compare letters at each position stepping to the right until a difference appears. This systematic approach prevents confusion with similar-looking words.

Step-by-Step Solution:
Step 1: Note the first two letters: Optimistic → Op… Opposition → Op… Organization → Or… Ordinary → Or… Step 2: Words starting with Op come before those starting with Or, because p comes before r. So Opposition and Optimistic will come before Ordinary and Organization. Step 3: Order the “Op” words: Opposition and Optimistic. Opposition: O P P O S…; Optimistic: O P T I M… At the third letter we compare P vs T. Since P comes before T, Opposition (ii) comes before Optimistic (i). Step 4: Order the “Or” words: Organization and Ordinary. Ordinary: O R D I…; Organization: O R G A… Compare third letters: D vs G. D comes before G, so Ordinary (iv) comes before Organization (iii). Step 5: Combine the groups: Opposition (ii), Optimistic (i), Ordinary (iv), Organization (iii).

Verification / Alternative check:
Visualise a dictionary: all “Opp…” entries are encountered before “Opt…”, and all “Op…” words are listed before any “Or…” words. Under “Or…”, you will see “Ord…” before “Org…”. This yields the order Opposition, Optimistic, Ordinary, Organization, which matches the sequence ii, i, iv, iii.

Why Other Options Are Wrong:
- ii, i, iii, iv incorrectly places Organization (Org…) before Ordinary (Ord…), despite D coming before G.
- iv, iii, ii, i starts with Ordinary and Organization, ignoring that all “Op…” words must come earlier than “Or…” words.
- i, ii, iii, iv puts Optimistic before Opposition, though P (from OPP…) is alphabetically prior to T (from OPT…).

Common Pitfalls:
Students sometimes rely on the approximate sound of words and may, for example, place “organization” earlier because it feels more familiar. Another mistake is failing to separate Op and Or groups correctly. Always work strictly by letters: compare them at each position and do not skip ahead or rely only on intuition.

Final Answer:
The correct dictionary order is Opposition, Optimistic, Ordinary, Organization, corresponding to ii, i, iv, iii.