ENTHALPY of moist air is GIVEN by:\(h = {h_{air}} + \omega {h_{VAPOUR}}\)where, hair = Cp,air × tCalculation:∴ hair = 1.005 × tand hvapour at any temperature is:hvapour = LATENT heat of vapour + Cp,vapour × thvapour = 2500 + 1.88thair = 1.005t + ω(2500 + 1.88t)∴ hair = (1.005 + 1.88ω)t + 2500ω THEREFORE option (1) is correct.