Match the following options in List 1 correctly with those in List 2:

1-b, 2-c, 3-d, 4-a

In Nomadic Herding a wide variety of animals is kept in different regions. In tropical Africa, cattle are the most important livestock, while in Sahara and Asiatic deserts, sheep, goats and camel are reared. In the mountainous areas of Tibet and Andes, yak and llamas and in the Arctic and sub-Arctic areas, reindeer are the most important animals.