About python

Please choose an option [a/b/c/d]:

a) apple

b) pie

c) nothing

d) Quit

I want to show user this and depends on what option they choose, the corresponding content will appear.

For example, when a user chooses option a, python will show "input how many apples you like" and let the user to input something.

These four options will keep on appearing until the user has chosen to quit.

I tried to use while loop to do this but unlucky it always false.