31. Two beaker of capacity 500 mL were taken. One of these beaker, labelled as “A” was filled with 400 mL water whereas the beaker labelled “B” was filled with 400 mL of 2 M solution of NaCl. At the same temperature both the beakers were placed inn closed containers of same material and same capacity as shown in figure

At a given temperature, which of the following statement is correct about the vapour pressure of pure water and that of NaCl solution

a. Vapour pressure in container (A)  is more than that in container (B)

b. Vapour pressure in container (A) is less than that in container (B)

c. Vapour pressure is equal in both the containers

d. Vapour pressure in containers (B) is twice the vapour pressure  in container (A)

Ans. a