Which one of the following pairs is not correctly matched?

1. The question asks which pair is not correctly matched. 2. Pair (A): The Seikan Rail Tunnel connects the Japanese islands of Honshu and Hokkaido. It is located in Japan, not China. (Incorrectly matched). 3. Pair (B): The Petronas Towers are iconic twin skyscrapers located in Kuala Lumpur, Malaysia. (Correctly matched). 4. Pair (C): The Appalachian Trail is a long-distance hiking trail extending between Georgia and Maine in the eastern United States of America. (Correctly matched). 5. Pair (D): The Rogun Dam is an embankment dam under construction on the Vakhsh River in southern Tajikistan. (Correctly matched). 6. Since pair (A) is incorrectly matched, it is the correct answer to the question.