Which is the best mobile pattern to use for a form’s select box?

I need to design a responsive website with many widgets and forms.
I want to provide the best UX to mobile users also when they interact with forms, which is often a nightmare on mobile.
You can find the form I am dealing …
Which is the best mobile pattern to use for a form’s select box?

I need to design a responsive website with many widgets and forms.
I want to provide the best UX to mobile users also when they interact with forms, which is often a nightmare on mobile.
You can find the form I am dealing …