Spelling – Identify the one misspelled word among options A–D, or choose “All correct” if every option is correctly spelled. A) Numerous B) Nucleus C) Nuisence D) Numismatics

Introduction / Context:
The test probes look-alike letter sequences nu-/nu-i-/nu-e- and the common trap in the word “nuisance”. The goal is to single out the misspelling among four scientific/academic terms beginning with “nu-”.

Given Data / Assumptions:

• Candidates: Numerous, Nucleus, Nuisance (presented as “Nuisence”), Numismatics.
• Reference: standard British/International English.

Concept / Approach:
Use morpheme recognition. “Nuisance” derives from Old French “nuisance” (harm). Its medial vowel sequence is “-sa-”, not “-se-”. Many speakers mishear the schwa and write nuisence; this is a classic spelling error.

Step-by-Step Solution:

Verification / Alternative check:
Mnemonic: nui + s + ance (think “a nuisance has an a”). Dictionaries uniformly mark “nuisance” as correct; “nuisence” is nonstandard.

Why Other Options Are Wrong:

• Numerous: Correct adjective meaning many.
• Nucleus: Correct scientific term.
• Numismatics: Correct field name.

Common Pitfalls:
Interchanging “-ance” and “-ence”. As a rough guide, many verbs ending in -y/-ure/-ear lead to -ance nouns, but rules are irregular; memorize frequent offenders like maintenance, nuisance, acquaintance.

Final Answer:
Nuisence