Correct Answer:
B. (B) 2007
The Quadrilateral Security Dialogue (Quad) was initially formed in 2007, bringing together the US, Australia, Japan, and India for strategic discussions.
The answer is B. 2007.
While the Quadrilateral Security Dialogue (Quad) did gain renewed focus around 2020 due to growing tensions with China, its initial formation dates back to 2007.