Question

If moist air is sensibly cooled above its dew point which of the following statements are correct?

         1. Relative humidity decreases

          2. Wet bulb temperature decreases    

         3. Wet bulb temperature increases  

         4. Humidity ratio remains increases

Select the correct answer using the codes given below            

(a) 1 and 2          (b) 1 and 3       (c) 3 and 4       (d) 2 and 4