Arrange the given words i. Victory ii. Victorious iii. Vaccine iv. Vacancy in the same order in which they would appear in a standard English dictionary.

Introduction / Context:
This question focuses on dictionary order among words that share similar initial letters. The learner must arrange Vacancy, Vaccine, Victory, and Victorious correctly according to alphabetical rules. Because all start with V, and several begin with V A, close attention to the third, fourth, and subsequent letters is important for accurate ordering.

Given Data / Assumptions:

Words: Victory, Victorious, Vaccine, Vacancy. Labels: i. Victory, ii. Victorious, iii. Vaccine, iv. Vacancy. We apply standard lexicographic ordering, ignoring capitalisation. If one word is a prefix of another, the shorter word is placed earlier.

Concept / Approach:
Dictionary order compares words letter by letter from left to right. When initial letters match, we move forward until a difference appears. The first position where letters differ determines which word comes first. In this set, Vacc words start with V A C, while Vict words start with V I C. Since A comes before I, all words beginning with V A come before those beginning with V I. Within each subgroup, further letters decide the precise order.

Step-by-Step Solution:
Step 1: Separate the words into V A and V I groups. Vacancy and Vaccine start with V A, while Victory and Victorious start with V I. Step 2: Compare Vacancy and Vaccine. Spellings are Vacancy (V A C A N C Y) and Vaccine (V A C C I N E). Step 3: Up to V A C the letters match. At the fourth letter, Vacancy has A and Vaccine has C. Since A comes before C, Vacancy comes before Vaccine. Step 4: Compare Victory and Victorious. Victory is V I C T O R Y, Victorious is V I C T O R I O U S. Victory is a shorter word that acts like a base form, while Victorious is a longer extension. Step 5: When one word is a prefix of another, the shorter word appears first, so Victory comes before Victorious. Step 6: All V A words precede V I words, so the complete order is Vacancy, Vaccine, Victory, Victorious. Mapping to labels gives iv, iii, i, ii.

Verification / Alternative check:
A quicker verification is to think of the two pairs as V A C A versus V A C C, and Victory versus Victorious. Recognising that A at the first differing position comes before C confirms Vacancy first among the V A pair. For the V I pair, the shorter root word Victory naturally precedes its longer derivative Victorious. Placing V A words before V I words then yields the combined order iv, iii, i, ii, confirming the result.

Why Other Options Are Wrong:
Any sequence starting with Vaccine places the C after the A of Vacancy incorrectly, so options that begin with Vaccine first are wrong. Options that place Victory after Victorious ignore the rule that a shorter word that is a prefix of a longer one should come earlier. Sequences that mix V I words before V A words ignore that A comes before I, contradicting the basic alphabetical order. Thus option iv, iii, i, ii is the only one that respects both subgroup ordering and overall alphabetical positions.

Common Pitfalls:
Students often rely on familiarity rather than strict letter comparison and may think of Victory and Victorious as a pair that must appear together, forgetting to compare them with Vaccine and Vacancy correctly. Another pitfall is to arrange words roughly by visual impression without checking each relevant letter. Underlining the first point of difference and remembering the prefix rule for shorter words can prevent such mistakes.

Final Answer:
The correct dictionary order is iv, iii, i, ii.