The correct option is C NH4Cl and NH4NO3
NH4Cl and NH4NO3 have both ionic and covalent bonds.
In ammonium ion NH+4, there are N−H covalent bonds.
Ionic bonds are present between ions of opposite charge.
In NH4Cl, ionic bonds are present between ammonium ion NH+4 and chloride ion Cl−.
In NH4NO3, ionic bonds are present between ammonium ion NH+4 and nitrate ion NO−3.