We are given that equal masses of water and methane absorb an equal amount of heat but the temperature of the methane is greater than the change in temperature of the gas.
The temperature is a measure of the mean kinetic energy of the particles of a substance. If we add energy then the kinetic energy of the particle will increase and therefore the temperature will also increase.
the stronger the force between the particles will cause fewer changes in temperature. Therefore, since methane has a greater increase in temperature than water this means that the force between the molecules of water is stronger than that of methane. Therefore, the right answer is B.