Cyclopropane rearranges to form propane :
`DeltararrCH_(3)-CH=CH_(2)`
This follows first order kinetics. The rate constant is `2.174xx10^(-3) "sec"^(-1)` . The initial concentration of cyclopropane is `0.29 M` . What will be the concentration of cyclopropane after 100 sec
A. `0.035 M`
B. `0.22 M`
C. `0.145 M`
D. `0.0018 M`