To produce an annual income of Rs. 1200 from a 12% stock at 90, the amount of stock needed is__________?

A. Rs. 10,000
B. Rs. 10,800
C. Rs. 14,400
D. Rs. 16,000
For an income of Rs. 12, stock needed = Rs. 100.
For an income of Rs. 1200, stock needed = Rs.( 100/12 X 1200 ) = Rs. 10,000.