elements whose electronegativities are 1.2 and 4 form

1.Ionic 2. Covalent 3.Coordinate 4.Mettalic 5.cannot be predicted

Actually it is the difference in electronegativity which decides which type of bond an element will have with another bond.
for difference less than 1.7 it is covalent bond
for diffeerence greater than 1.7 it is ionic bond.
So based on the electronegativity it cannot be decided.
It should be the electronegativity difference which decides