Answer : B Smile
Reason:
Grin : a wide smile
It is usually given when we have some reason behind this happiness.
Smirk: Silly Smile
It doesn't give a positive emotion.
Wink : close and open one eye quickly, typically to indicate that something is a joke.
It is very Informal, which is not accepted as a positive emotion in many cultures.
Frown: It is an expression which conveys Negative emotion .