How to expose variables in c# according to selected booleans

Can I make a variable that, if it is ticked, exposes more variables in the inspector?

For Example: if I make a script called "Vehicles" and has three checkboxes

          []car

          []plane

          []boat

if I check one of these boxes, it reveals more attributes:

          [x]car
              Color      red
              doors       4
              type      minivan
              sucks?     yes

          []plane

          []boat

Is that even possible?

If so, how?

Thanks in Advance. :)