Which of the following word is wrongly spelt?

Option D is the misspelling. The correct word is convenience, derived from the adjective convenient. The middle vowel is unstressed and slurred in speech, which tempts many people to write 'convinience' as if it followed 'convince'. The root decides the spelling, not the sound.

The other three are correct. Correspondence has a double r, 'spond', and the -ence ending. Conscience keeps the 'sc' and ends in -ience, one of the few such words in English. Occurrence has a double c and a double r, with the -ence ending.

• Correspondence: correct
• Conscience: correct
• Occurrence: correct
• Convinience: wrong, the correct form is convenience

Core concept: orthographic accuracy in English. This matters beyond Prelims because precise language in official drafting, reports and precis writing is judged closely in Mains.

Trap: Candidates who spot the odd-looking word quickly often skip checking the others. Verify each option before you mark the answer.