The correct answer is France. Explanation & Key Takeaways: QUAD: • It is an informal (neither economic nor military) strategic forum comprising India, Japan, Australia, and the United States of America. • The Quadrilateral Security Dialogue (the Quad) is an informal strategic forum between the United States, Japan, Australia, and India. The grouping is maintained by semi-regular summits, information exchanges, and military drills between member countries. • The idea was first mooted by Japanese Prime Minister Shinzo Abe in 2007 (although the main progress started in 2017 after the Philipines meeting). • It aims to ensure and support a “free, open, and prosperous” Indo-Pacific region. Related Concepts: The objective of Quad: • To advance the security and the economic interests of all countries having legitimate and vital interests. • To develop a new strategy to keep the critical sea routes in the Indo-Pacific free of any influence (especially China). • It has become necessary due to the increased presence of the Chinese Navy in the Indian Ocean. • From the Indian context, the rising dominance of China is a new and emerging security concern.