Which sentence uses an article that points out a particular noun? my grandparents flew on an airplane. do you want the leftover spaghetti for dinner? that is my favorite color. my music teacher has a grand piano.

The correct answer is 2. He wants to save Juliet from Paris and has no other way to do it.  

Explanation:

Lord Capulet wanted to marry Juliet to Paris. But she refused to do it. And Capulet threatened to disown her. Juliet went to Friar Laurence to get some advice. He came with only one idea to help her and it was to give her a potion that will make it seem like she is dead, but the potion will be used to make her sleep for a while. And Romeo would come for her. So the most suitable option is that Friar wanted to save Juliet from Paris.