sublimity --> When something is sublime, it transcends greatness or beauty for the observer — like a deeply moving film or a transcendent piece of music. So when something is truly wonderful, or someone acts in a truly noble way, it's an example of sublimity. The Latin root, sublimis, means "uplifted, high, or exalted " .
Erosion means A gradual decline of something
Contemptibility means cheap or pathetic
insistency means pressure
nobility means aristocrasy
so option B, Contemptibility is the best choice for Antonym .