A man invests in a 16% stock at 128. The interest obtained by him is	Select the correct option:
A) 22.5%  B) 42.5%  C) 12.5%  D) 62.5%  E) 82.5%
By investing Rs 128, income derived = Rs. 16   By investing Rs. 100, income derived = = Rs.12.5   Interest obtained = 12.5%   Answer: 12.5%
<result>C</result>
A man invests in a 16% stock at 128. The interest obtained by him is