Detailed Solution:
The correct answer is “3 2 4 1”.
List-I (Leading producer Country) - List-II (Commodity)
A. China - 3. Iron-Ore
B. India - 2. Milk
C. Saudi Arabia - 4. Petroleum
D. Thailand - 1. Natural Rubber
1) Thailand is the world's leading producer of natural rubber.
2) India is the world's largest milk producer.
3) The top three iron ore producing countries in the world are: Australia > China > Brazil.
4) The USA is the largest producer of petroleum followed by Saudi Arabia, Russia and Canada.