What is your design process?
A prototype doesn’t need to be beautiful, it has to add value. The prototype’s level of detail is linked to the phase it’s in. First you do it lo-fi and later on you make it hi-fi.
What will matter is your ability to describe your process and explain the rationale behind your approach.
https://uxplanet.org/ux-design-drop-downs-in-forms-c6943ec30037#.ivc6nl3l6