The correct answer is Option 2: 2 only.

Let`s examine each pair to determine whether they are correctly matched:

1. ABN Amro Bank : USA

ABN Amro Bank is a Dutch bank headquartered in Amsterdam, Netherlands. It does not have its primary presence or headquarters in the United States. ABN Amro Bank operates internationally and has offices and branches in various countries, but the United States is not one of its major operational regions. Therefore, this pair is not correctly matched.

2. Barclays Bank : UK

Barclays Bank is a British multinational bank and financial services company headquartered in London, United Kingdom. This pair is correctly matched because Barclays Bank is indeed based in the UK. It is one of the largest banks in the UK and has a significant presence and operations within the country. Barclays Bank provides various banking and financial services to individuals, businesses, and institutions in the United Kingdom and globally. Therefore, this pair is correctly matched.

3. Kookmin Bank : Japan

Kookmin Bank, also known as KB Bank, is a major South Korean bank. It is headquartered in Seoul, South Korea, and operates primarily in South Korea. It does not have its primary presence or headquarters in Japan. While Kookmin Bank may have some international operations or branches in other countries, Japan is not its major operational region. Therefore, this pair is not correctly matched.

Based on the analysis above, only pair 2: "Barclays Bank : UK" is correctly matched. Therefore, the correct answer is Option 2: 2 only.