Option 1 -> boorish means rude or ill-mannered, not related to sadness.
Option 2 -> benign means gentle or harmless, not a feeling of sadness.
Option 3 -> cheerful means happy and optimistic, which is the opposite of melancholy.
Option 4 -> despondent means deeply sad and hopeless, matching the meaning of melancholy.
Hence, Option 4: despondent -> Melancholy refers to a deep, pensive sadness, and despondent similarly describes a state of dejection and hopelessness, making them synonyms -> correct