11% stock at 143

$9\frac{3}{4}\%stockat117$

Both are equally good

Cannot be compared, as the total amount of investment is not given.

B. $9\frac{3}{4}\%stockat117$

Let investment in each case be Rs. (143 x 117).

Income in 1st case =$Rs.\left(\frac{11}{143}\times 143\times 117\right)=Rs.1287.$

Income in 2nd case = $Rs.\left(\frac{39}{4\times 117}\times 143\times 117\right)=Rs.1394.25$

Clearly, $9\frac{3}{4}$ % stock at 117 is better.