In order to obtain an income of Rs. 650 from 10% stock at Rs. 96, one must make an investment of___________?

A. Rs. 6240
B. Rs.3100
C. Rs.6500
D. Rs.9600
To obtain Rs.10, investment = Rs. 96.
To obtain Rs. 650,
investment= Rs.(96/10 x 650) = Rs. 6240.