Indian Institute of Foreign Trade 2012 Solved Paper

Growth of Iron Ore$=\frac{163-100}{100}=63\%$
Growth of Aluminum $=\frac{105-69}{69}\approx 50\%$
Growth of Gold $=\frac{25-15}{15}=66.66\%$
Growth of Copper $=\frac{103-71}{71}\approx 45\%$
Thus, Gold witnessed highest growth rate in production from 2005 to 2011.
Hence, option C is the correct answer.