From the given alternatives, select the word which cannot be formed using the letters of the word Transaction, assuming that no letter is used more times than it appears in the original word.

Introduction / Context:
Here the base word is Transaction, and your task is to identify which option cannot be formed from its letters. This reinforces the skill of verifying whether each letter in an option is part of a limited pool provided by the base word. It is a standard verbal reasoning pattern seen in many aptitude exams.

Given Data / Assumptions:

• Base word: Transaction.
• Letters available: T, R, A, N, S, A, C, T, I, O, N.
• Options: Ran, Action, Train, Role.
• Each letter may be used at most as many times as it appears in the base word and no new letters can be introduced.

Concept / Approach:
We determine the set of letters present in Transaction and then check each option word against this set. Any option using letters outside the set is impossible to form. If the letters are all present but the word requires more occurrences than available, that option would also be impossible. In this particular case, the main focus is on letters such as L and E, which do not appear visibly in the base word.

Step-by-Step Solution:
Step 1: List the distinct letters in Transaction: {T, R, A, N, S, C, I, O} with appropriate counts for repeated letters like A, N and T. Step 2: Check Ran: R, A, N all appear in the base word, so Ran can be formed. Step 3: Check Action: A, C, T, I, O, N all exist in Transaction and within available frequencies, so Action can be formed. Step 4: Check Train: T, R, A, I, N are present in the base word, so Train can be formed. Step 5: Check Role: R, O, L, E are required. Although R and O appear, the letters L and E do not occur in Transaction, making Role impossible to form with the given letters.

Verification / Alternative check:
An alternate way is to mentally or on paper list the set {T, R, A, N, S, C, I, O}. When you scan the options, Ran, Action and Train use only these letters. Role, however, includes L and E, which are absent from the set. This instantly shows that Role cannot be formed from Transaction, confirming the result obtained through step-by-step checking.

Why Other Options Are Wrong:
Ran is simply formed from R, A and N, all clearly visible in the base word. Action uses every letter in a way that is fully supported by Transaction. Train similarly uses only letters T, R, A, I and N, all of which occur in the base word. Since all three of these are feasible, none of them can be the correct answer to the question that asks for the impossible word.

Common Pitfalls:
One pitfall is assuming that because a word is short it must be easy to form, but short words can also contain letters that are not available. Another issue is not writing down the letter set and missing absent letters like L and E in Role. Good practice is to always derive the set of unique letters and compare each option carefully, especially under exam time limits.

Final Answer:
The word that cannot be formed from Transaction is Role, so Role is the correct answer.