Multiple choice general knowledge Which of the following spellings is correct? Observatery Observatory Observetory Observatary Reveal answer Fill a bubble to check yourself B Correct answer Explanation The correct spelling is "Observatory" with 'or' and 'ory'. Option A has 'er' instead of 'or', Option C has 'et' instead of 'rv', and Option D has 'ar' instead of 'or'.