Listing type/category selection

[Aleksandar Apostolovski]

Hi,
is it possible for users to select only listing type when they try to add a new listing?
I ask this because I have only one category per each listing type and there is no need for users to select the category too.
Can the category be auto-selected in the background when a user selects the listing type and be not visible at all in the add listing procedure?
I've attached a picture to show what I need.