Among the following, the type of bonding exist in ${\mathrm{NH}}_4\mathrm{Cl}$  is

In ${\mathrm{NH}}_4\mathrm{Cl},$ we can observe ionic bond between ammonium ion and chloride ion. In ${\mathrm{NH}}_4^{+}$the nitrogen donates one lone pair electron to hydrogen ion this is called as dative bond or coordination covalent bond. In ammonia $\left({\mathrm{NH}}_3\right)$we can see pure covalent bonds between nitrogen and hydrogen.