Correct Option: A

Ammonium chloride (NH₄) is generally considered as an ionic compound but this compound has three different types of bond. There is ionic bond between NH₄+ ion and Cl– ion. There are N-H covalent bonds. The formation of NH₄+ from NH₃is sometimes described as the formation of a coordinate bond between NH₃and H+ , however once the bond is formed there is no difference between the four N-H bonds, NH₄+ has a tetrahedral structure.