Answer: b. homophones
Explanation: These words sound the same, but do not have the same definitions (therefore, are not synonyms). Furthermore, these words don't have contradictory definitions (or opposite ones). Therefore, they are not antonyms.
B adjective phrase is the correct answer
Assuming this is at the beginning of the play Act I he is feeling cheerful because he is heading to the ball to see Rosaline his love before Juliet