Q. Headquarters of the “Organisation for Economic Co-operation and Development (OECD)” is located in which country?
Answer: France
Notes:

The headquarters of the Organisation for Economic Co-operation and Development (OECD) is located in Paris, the capital city of France. The Organisation for Economic Co-operation and Development is an intergovernmental economic organisation with 37 member countries, founded in 1961 to stimulate economic progress and world trade. It is a forum of countries describing themselves as committed to democracy and the market economy, providing a platform to compare policy experiences, seek answers to common problems, identify good practices and coordinate domestic and international policies of its members.