By investing in 162/3 % stock at 64, one earns Rs. 1500. The investment made is:

Answer: Option B

To earn Rs. $$\frac{50}{3},$$ investment = Rs. 64
To earn Rs. 1500,
investment =
$$\begin{array}{rl}& Rs.\left(64\times \frac{3}{50}\times 1500\right)\\ & =Rs.5760\end{array}$$