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
79
360
>20% The proportion of Copper in 2008 =
88
449
<20% The proportion of Copper in 2009 =
92
462
<20% The proportion of Copper in 2010 =
97
486
<20% Thus, as we can see the proportion of Copper in 2007 is the highest. Hence, option A is the correct answer.