Magan (A - II): Magan is believed to correspond to the region of modern-day Oman. It was a significant ancient trading partner with Mesopotamia, known for its trade in copper and other commodities.

Dilmun (B - IV): Dilmun is associated with the ancient civilization that existed in the area of present-day Bahrain. It was a major center for trade, particularly in goods such as pearls, copper, and dates.

Meluhha (C - I): Meluhha is often identified with the Harappan civilization, which thrived in the Indus Valley. This ancient civilization had advanced urban centers like Harappa and Mohenjo-Daro.

Shortughai (D - III): Shortughai is an archaeological site in Afghanistan. It has been associated with the ancient trade of lapis lazuli, a prized blue stone, indicating its role in trade networks.

So, the correct option is [4].