A invested some money in 10% stock at 96. If B wants to invest in an equality good 12% stock, he must purchase a stock worth of___________?

A. Rs.50
B. Rs.105
C. Rs.115.20
D. Rs.125.40
For an income of Rs.10,investments=Rs.96.
For an income of Rs.12,
investments=Rs.(96/10 x 12) =Rs.115.20.