Word formation from letters of SPECIFICATION Which ONE of the following words cannot be formed from the letters of “SPECIFICATION”, using each letter at most once?

Introduction / Context:
Identify the single option that violates letter availability.

Given Data / Assumptions:

• Source: SPECIFICATION ⇒ letters include S,P,E×2,C×2,I×3,F,A,T,O,N.

Concept / Approach:
Check each option's letter requirements against the multiset.

Step-by-Step Solution:
“PACIFIC”: P,A,C×2,I×2,F ⇒ all present.“FACTION”: F,A,C,T,I,O,N ⇒ all present.“TONIC”: T,O,N,I,C ⇒ present.“FAINTING”: F,A,I,N,T,I,N,G ⇒ requires G (absent) and N×2 (source has N×1) ⇒ cannot be formed.

Verification / Alternative check:
Double-check counts of N and presence of G.

Why Other Options Are Wrong:
They are feasible within the available letters.

Common Pitfalls:
Missing the absent letter G or over-counting N.

Final Answer:
FAINTING