An air stream at a specified temperature and relative humidity undergoes evaporative cooling by spraying water into

Question:

An air stream at a specified temperature and relative humidity undergoes evaporative cooling by spraying water into it at about the same temperature. The lowest temperature the air stream can be cooled to is
(a) The dry bulb temperature at the given state
(b) The wet bulb temperature at the given state
(c) The dew point temperature at the given state
(d) The saturation temperature corresponding to the humidity ratio at the given state
(e) The triple point temperature of water