SSC CHSL 15 Oct 2020 Shift 1 Paper

According to the bar graph,
Difference of the rainfall, in $2005-2006$
$=50-40=10\mathrm{cm}$
Difference of the rainfall in $2006-2007$
$=100-50=50\mathrm{cm}$
Difference of the rainfall in $2007-2008$
$=100-80=20\mathrm{cm}$
Difference of the rainfall in $2008-2009$
$=80-20=60\mathrm{cm}$
Difference of the rainfall in $2009-2010$
$=120-20=100\mathrm{cm}$
∴ Difference of the rainfall was minimum in 2005-2006.