In the redox reaction, `2MnO_(4)^(-)+5C_(2)O_(4)^(2-)+16H^(+) to 2Mn^(2+)+10CO_(2)+8H_(2)O`
20mL of 0.1 M `KMnO_(4)` reacts quantitatively with :
A. 20 mL of 0.1 M oxalate
B. 40 mL of 0.1 M oxalate
C. 50 mL of 0.25 M oxalate
D. 50 mL of 0.1 M oxalate