Which one of the following words has been spelt correctly?

The correct spelling is Correspondence (Option D). It has a double r, and the ending is -ence, not -ance.

• A (Corespondence): drops one r. The root is correspond (cor- + respond), so both r's must stay.
• B (Correspondance): gets the double r right but uses the wrong ending. Nouns from the -ent forms such as correspondent, existent and independent take -ence.
• C (Corespondance): makes both errors at once.

Core concept: spelling of derived nouns. The -ance and -ence endings cannot be reliably decided by sound, so link the noun to its base: correspondent leads to correspondence. The same logic applies to existence, difference and preference.

Mains angle: official correspondence, RTI replies and government orders are judged on precision of language, and a clean drafting habit shows in answer writing.

Trap: candidates pick B because -ance looks more familiar. Remember correspondent, so correspondence.