R−Br→Mg/etherA→D2OCH3CH2D, R-Br by Wurtz reaction gives rise to which of the following product(s)

C2H5−Br→Mg/etherC2H5MgBr→D2OCH3CH2D, So, R-Br is ethyl bromide on reaction with sodium metal it forms n-Butane as major product as follows , 2C2H5−Br→Na/etherC2H5−C2H5