What one term US President lost the only Presidential election he ever ran in?

Question

He never ran for Vice President. He only ever ran for President, and that was just once. And he lost that election. But he was a one term President, nonetheless.

I know who--do you?

Answer 1

Gerald Ford? Nixon appointed him as VP when Agnew resigned, then Nixon of course resigned, so Ford became President.

Answer 2

I don't believe that you can run for the office of the VP.

Answer 3

???

Answer 4

John Quincy Adams

Answer 5

Gerald Ford