An aqueous solution of $6.3\;g$ oxalic acid dihydrate is made up to $250\;ml$ . The volume of $0.1\;N\; NaOH$ required to completely neutralize 10 ml of this solution is

Question

$(a)\;40\;ml \\ (b)\;20\;ml \\(c)\;10\;ml \\(d)\;4\;ml$