JEE Main 2020 Chemistry question

The strength of an aqueous NaOH solution is most accurately determined by titrating : (Note : consider that an appropriate indicator is used)

• (A)Aq. NaOH in a burette and aqueous oxalic acid in a conical flaskCorrect
• (B)Aq. NaOH in a pipette and aqueous oxalic acid in a burette
• (C)Aq. NaOH in a volumetric flask and concentrated in a conical flask
• (D)Aq. NaOH in a burette and concentrated in a conical flask