12 mol gaseous mixture of an alkane and an alkene (containing same number of carbon atoms) require exactly 285 ml of air (containing 20% v/v `O_(2)` and rest `N_(2)` ) for complete combustion at 200K . After combustion when gaseous mixture is passes through KOH solution it shows volume contraction of 36 ml.
Formula of alkane is:
A. `C_(5)H_(12)`
B. `C_(3)H_(8)`
C. `C_(2)H_(6)`
D. `C_(4)H_(10)`