Japanese sentence "彼らの意見は常にすれ違っている。" translates to "Their opinions are always different.", the word "すれ違っている" in the sentence has these possible definitions: 1. to pass (by) each other; to brush past 2. to miss (meeting) each other; to fail to meet 3. to be at odds; to clash; to be in conflict. Which one do you think fits best in this context? Please respond only with the number of the correct definition, just one numeral please, no other words.