The correct spelling is 'sacrilegious' with single 'c', single 'i', single 'e' after 'sacr' and then 'legious'. Option A incorrectly uses 're' instead of 'le'. Option B incorrectly uses single 'i' and 'le' transposed. Option D incorrectly uses 'rele' instead of 'le'. This word meaning 'desecrating something sacred' is commonly misspelled due to confusion with 'religious'.