Which one of the following mixture can act like a buffer?

Mixture containing excess of weak base and limited strong acid acts like basic buffer.
(2) 
$$\begin{gathered} \begin{array}{r}{\mathrm{V}}_{\mathrm{a}}{\mathrm{N}}_{\mathrm{a}}\left(\mathrm{SA}\right)=100 \mathrm{milli} \mathrm{equivalents} \\ {\mathrm{V}}_{\mathrm{b}}{\mathrm{N}}_{\mathrm{b}}\left(\mathrm{WB}\right)=200 \mathrm{milli} \mathrm{equivalents} \end{array} \\ \underset{100 \mathrm{m}.\mathrm{eq}}{\mathrm{S}.\mathrm{A}} + \underset{100 \mathrm{m}.\mathrm{eq}}{\mathrm{W}.\mathrm{B}} \to \underset{100 \mathrm{m}.\mathrm{eq}}{\mathrm{Salt}} +{\mathrm{H}}_2\mathrm{O} \\ \mathrm{But} \mathrm{excess} \mathrm{W}.\mathrm{B} \mathrm{left} = 100 \mathrm{m}.\mathrm{eq} ; \end{gathered}$$
Solution contains 100 milli equivalents of NH₄OH and 100 milli equivalents of NH₄Cl. It is a basic buffer.