After remaining neutral for almost 200 years, which one of the following countries officially joined the NATO in March 2024 ?

Explanation

Sweden, a European country that had remained militarily non-aligned for more than 200 years, officially joined NATO (North Atlantic Treaty Organization) in March 2024. After Sweden joined, the membership of this US-led intergovernmental military alliance became 32. Earlier, in April 2023, Finland became NATO’s 31st member. NATO was founded on 4 April 1949 with the signing of the North Atlantic Treaty. Its headquarters is in Brussels (Belgium).