Hi, welcome to the forum

Assuming you are testing for either cell is blank or cell has contents, and that only 1 of the 3 will have contents, here is an alternative...

=IF(A1="","CAR",IF(B1="","HOUSE",IF(C1"","ROAD")))

If 1 of the 3 will always have contents, you can shorten that to...
=IF(A1="","CAR",IF(B1="","HOUSE","ROAD"))