Indian Institute of Foreign Trade 2010 Solved Paper

smaller insignificant values $\approx 5.2$
Option 'A' $=3\mathit{e}-1=3\times 2.718-1=7.15$therefore cannot be our answer
Option 'B' $=3\left(\mathit{e}-1\right)=3\times \left(2.718-1\right)=5.154$ therefore can be our answer
Option 'C' $=3\left(\mathit{e}+1\right)=3\times \left(2.718+1\right)=11.15$ therefore cannot be our answer
Option 'D' $=3\mathit{e}+1=9.15$ therefore cannot be our answer
Therefore option 'B' is our answer