HCl + NH₄OH → NH₄Cl + H₂O is an acid-base neutralization reaction. We can find using Kohlrausch law of independent migration of ions. This law states that limiting molar conductivity of an electrolyte is equal to the sum of the individual limiting molar conductivities of the anion and cation of the electrolyte.

NH₄OH is a weak base. We can calculate its limiting molar conductivity using limiting molar conductivities of strong salt NH₄Cl and NaCl. The cation NH₄⁺ is from strong electrolyte NH₄Cl and anion is from strong base NaOH.

The correct option is (ii).