10000(11/10)4 - 10000(6/5)2 = 241
How much more would Rs.10000 fetch, after two years, if it is put at 20% p.a. compound interest payable half yearly than if is put at 20% p.a. compound interest payable yearly?

a. 241
b. 725
c. 992
d. 837
e. 923