The correct option is
A Ethane
Calorific value is the amount of heat produced by complete combustion of 1 Kg of fuel,
so, in case of methane, 16g of methane produce −890.3Jmol−1 amount of energy,
so, 1 Kg of metahne produce −55643.75Jmol−1
in case of ethane, 28 g produce −1560Jmol−1 amount of energy
so, 1 Kg of ethane produce enrgy = −55714.28Jmol−1
hence, the energy produce by 1 Kg of ethane is mor than that of methane,
so, Ethane have higher calorific value.