Rate of evaporation from a water surface increases if

i)    difference of vapour pressure between water and air is increased
ii)   velocity of wind is decreased
iii)  concentration of soluble solids in water is decreased The correct answer is
a)    (i) and (ii)
b)    (i) and (iii)
c)    (ii) and (iii)
d)    (i). (ii) and (iii)

Ans: b