Indian Institute of Foreign Trade 2012 Solved Paper

The year wise total production of minerals and metals is as shown below:-
$2005=69+91+71+15+100=346$
$2006=75+88+75+18+120=376$
$2007=81+97+79+21+102=380$
$2008=98+107+88+25+131=449$
$2009=93+110+92+24+143=462$
$2010=99+116+97+20+154=486$
$2011=105+122+103+125+103=215$
Thus, the proportion of Copper in 2007 $\frac{79}{360}>20\%$
The proportion of Copper in 2008
The proportion of Copper in 2009
The proportion of Copper in 2010
Thus, as we can see the proportion of Copper in 2007 is the highest.
Hence, option A is the correct answer.