The correct option is D All of the products are formed
At moderate temperatures, dehydration of alcohol leads to the formation of ether. This happens when the alcohol is taken in excess.
CH3OHH+−−−−−→CH3OHCH3−O−CH3
C2H5OHH+−−−−−→C2H5OHC2H5−O−C2H5
CH3OH+C2H5OHH+−−→CH3−O−C2H5