The correct option is B combustion
Enthalpy of formation is the amount of heat evolved or adsorbed when one mole of a substance is formed from its constituent elements.
Enthalpy of combustion is the amount of heat evolved when one mole of a substance is completely oxidiseed.
Enthalpy of solution is the amount of heat evolved or adsorbed when one mole of a solute is dissolved in excess solvent.
Enthalpy of neutralisation is the amount of heat evolved or adsorbed when one gram equivalent of an acid is neutralised by one gram equivalent of a base in dilute solution.