Unscramble with indexed letters: E→(i), R→(ii), D→(iii), I→(iv), S→(v), P→(vi). Form a meaningful word and give the correct index order.

Introduction / Context:
We are given six letters and their indices. The task is to arrange them to form a meaningful English word and then report the sequence of indices that achieves it. This is a classic anagram-with-indices question.

Given Data / Assumptions:

• Letters: E(i), R(ii), D(iii), I(iv), S(v), P(vi).
• We must discover a valid English word using each letter once.
• Typical candidates include “SPIDER”, “PRIDES”, etc.

Concept / Approach:
Check common six-letter permutations. “SPIDER” matches all letters exactly and is a common dictionary word. Map its letter order back to indices to obtain the sequence demanded by the problem.

Step-by-Step Solution:

Verification / Alternative check:
Confirm that each letter is used exactly once and that the constructed word is valid English. No duplicates or omissions occur.

Why Other Options Are Wrong:

• Other index sequences correspond either to no valid English word or to scrambled nonsense (e.g., SIPDER, PRIDES requires repeating letters in a different placement).
• None of these: Incorrect because the listed order builds “SPIDER”.

Common Pitfalls:
Choosing a rarer word or misaligning indices to letters; forgetting to preserve the one-to-one correspondence.

Final Answer:
(v), (vi), (iv), (iii), (i), (ii)