The work done in ergs for the reversible expansion of one mole of an ideal gas from a volume of `10` litres to `20` litres at `25^(@)C` is
A. `-2.303xx298xx0.82 log 2`
B. `-298xx10^(7)xx8.31xx2.3031 log 2`
C. `-2.303xx298xx0.082 log 0.5`
D. `-8.31xx10^(7)xx298xx2.303 log 0.5`