Choose the most suitable word: An office or post with no work but high pay:

Choose the most suitable word: An office or post with no work but high pay:

A. Honorary
B. Sinecure
C. Gratis
D. Ex-Officio

Honorary: conferred as an honour, without the usual requirements or functions.
Sinecure: a position requiring little or no work but giving the holder status or financial benefit.
Gratis: without charge; free.
Ex-officio: by virtue of one’s position or status.