His living style and his conduct showed him opulent.

Answer: Option D

Opulent : ostentatiously costly and luxurious.
Sumptuous : splendid and expensive-looking.
Drooping : bend or hang downwards limply.
Wealthy : having a great deal of money, resources, or assets; rich.
Poor : lacking sufficient money to live at a standard considered comfortable or normal in a society.

Antonym of Opulent is Poor