The correct option is
A mixture of ethane, butane and propane
In the above reaction,
Y is mixture of ethane, butane & propane.
C2H5I+2Na+CH3I→C2H5propane−CH3+2NaI
C2H5I+2Na+C2H5I→C2H5butane−C2H5+2NaI
CH3I+2Na+CH3I→CH3ethane−CH3+2NaI
Option A is correct.