In Italy, the circle formed with the thumb and first finger means Options are: a. OK b. Beautiful c. Delicious d. Worthless

I assume that you are asking this in the context of
cross-cultural communications.  Gestures like this are something that a person has to be
very careful about because they can mean one thing in the person's own country and
something entirely different abroad.

In the US, the sign
you describe means "OK."  However, in Italy, as in many other countries, it means
something else.  Of the options you have given, the right answer is "D."  As I
understand it, "worthless" is actually a polite way of saying what this gesture means. 
It is said to mean the same thing as showing someone the middle finger in the
US.