Indian Institute of Foreign Trade 2012 Solved Paper

The Growth rate of Iron Ore in $2008=\frac{131-102}{102}\approx 30\%$
The Growth rate of Gold in $2011=\frac{25-20}{20}=25\%$
The Growth rate of Aluminium in 2008 $=81\approx 21\%$
The Growth rate of Iron Ore in $2008=\frac{18-15}{15}=20\%$
Hence, Highest annual growth rate in production is recorded in Iron Ore in 2008.
Hence, option A is the correct answer.