Which will make basic buffer?

1. A. 100 mL of 0.1 M HCl + 100 mL of 0.1 M NaOH
2. B. 50 mL of 0.1 M NaOH + 25 mL of 0.1 M CH3COOH
3. C. 100 mL of 0.1 M CH3COOH + 100 mL of 0.1 M NaOH
4. D. 100 mL of 0.1 M HCl + 200 mL of 0.1 M NH4OH

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