1. Jhuming - India (A)-(II): Jhuming is a form of shifting cultivation primarily practiced in northeastern India, particularly in states like Assam, Nagaland, Mizoram, and Meghalaya. It involves clearing a patch of forest, burning the vegetation, and cultivating crops in the fertile ash-enriched soil. After a few years, the field is left fallow, and a new patch of forest is cleared for cultivation.

2. Milpa - Mexico (B)-(III): Milpa is a traditional agricultural practice in Mexico, particularly among indigenous communities in Central America. It involves cultivating maize (corn), beans, and squash together in a symbiotic system. This method has been used for centuries and is designed to maintain soil fertility and promote crop diversity.

3. Ladang - Malaysia (C)-(I): Ladang refers to shifting cultivation practices in Malaysia, where it is often associated with the indigenous communities of Borneo. It involves clearing land for agriculture and rotating cultivation sites to allow for natural regeneration. This practice has been significant in the agricultural traditions of Malaysia.

4. Chena - Sri Lanka (D)-(IV): Chena cultivation is a form of shifting agriculture practiced in Sri Lanka, particularly in the dry zones of the country. It involves clearing and burning small plots of land to cultivate crops like millet, maize, and various pulses. After a few years of cultivation, the field is left fallow to regenerate.

So, the answer is option 4.