Cooling and dehumidification process

Question

Atmospheric air from 40⁰C and 60 percent relative humidity can be brought to 20⁰C and 60 percent relative humidity by:                                                                                                                                              

      (a) Cooling and dehumidification process

      (b) Cooling and humidification process

      (c) Adiabatic saturation process

      (d) Sensible cooling process