Choose the correctly spelt word.
a. Occurence b. Occurance c. Occurrence d. Occurrance

The correct answer is Option C (c).

Key Points:
• The word 'occurrence' is one of the most commonly misspelled words in the English language.
• The rule of doubling the consonant applies here: when a word ends in a single consonant preceded by a single vowel, and the stress is on the final syllable (oc-CUR), you double the consonant when adding a suffix starting with a vowel (-ence).
• Therefore, 'Occur' + 'rence' = 'Occurrence' (double 'c', double 'r', and ends with 'ence').
• Option (c) provides the exact correct spelling.
• Key Takeaway: Occurrence has double 'c', double 'r', and ends with 'ence'.