29. Match List-I with List-II:
| List-I (Theories of International Trade) | List-II (Propounder(s)) |
| (a) Theory of Absolute Advantage | (i) Raymond Vernon |
| (b) Factor Proportion Theory | (ii) Steffan Linder |
| (c) Country Similarity Theory | (iii) Heckscher Ohlin |
| (d) Product Life Cycle Theory | (iv) Adam Smith |
30. Concept testing, test marketing, and product testing are parts of which of the following?