Match List I with List II:
List-I (Example of colloids)          List-II (Classification)
(a) Cheese                                 (i) dispersion of liquid in liquid
(b) Pumice stone                      (ii) dispersion of liquid in gas
(c) Hair cream                           (iii) dispersion of gas in solid
(d) Cloud                                    (iv) dispersion of liquid in solid
Choose the most appropriate answer from the options given below: