The percentage increase in the foreign exchange reserves in 1997 - 98 over 1993 - 94 is:

Answer: Option A

\begin{aligned} & \text{Reserve in 1993 - 94 = 2520} \\ & \text{Reserve in 1997 - 98 = 5040} \\ & \text{Increase %} \\ & = \frac{5040 - 2520}{2520} \times 100\% \\ & = \frac{2520}{2520} \times 100 \\ & = 100\% \\\end{aligned}