Concept:Spelling errors are common in words like "privilege". The option "Priviledge" is incorrectly spelled.Explanation:Check each word: A. Supercilious (meaning arrogant) is correct. B. Prerequisite (meaning a required condition) is correct. C. Assassination (meaning murder) is correct. D. Priviledge is misspelled. The correct spelling is "Privilege", which means a special right or advantage. The common mistake is adding an extra 'd' after the 'i'. For example: It is a privilege to serve my country. Therefore, the misspelled word is "Priviledge". All other options are correctly spelled.Answer:D. Priviledge