An acidic buffer is obtained on mixing [JEE Main 2020, 3 Sep (Shift 1)]

\(100\mathrm{mL}\) of \(0.1\mathrm{M}\mathrm{HCI}\) and \(200\mathrm{mL}\) of \(0.1\mathrm{M}\mathrm{NaCI}\)

\(100\mathrm{mL}\) of \(0.1\mathrm{M}\mathrm{HCl}\) and \(200\mathrm{mL}\) of \(0.1\mathrm{M}\) \({\mathrm{CH}}_{3}\mathrm{COONa}\)

\(100\mathrm{mL}\) of \(0.1\mathrm{M}{\mathrm{CH}}_{3}\mathrm{COOH}\) and \(100\mathrm{mL}\) of \(0.1\mathrm{M}\) \(\mathrm{NaOH}\)

\(100\mathrm{mL}\) of \(0.1\mathrm{M}{\mathrm{CH}}_{3}\mathrm{COOH}\) and \(200\mathrm{mL}\) of \(0.1\mathrm{M}\) \(\mathrm{NaOH}\)