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• central Intelligence agency (CIA),
• most important foreign intelligence and counterintelligence organisation of the U.S. government.
• officially created in 1947, the critical Intelligence corporation (CIA) grew out of the arena warfare II office of Strategic services (OSS).
  

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The Mekong river is Known as the mother of Rivers located in Laos and Thailand.

It is 12th longest river in the world.

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Adam Smith, an 18th-century Scottish philosopher.

He is considered the father of modern economics.

He is most famous for his work, "The Wealth of Nations".

It published on 9 March 1776, during the Scottish Enlightenment and the Scottish Agricultural Revolution.

Explanation

The OECD headquarters are located at the Château de la Muette in Paris, France.

The Organization for Economic Co-operation and Development (OECD) is an international organization that aims to promote economic growth, prosperity, and sustainable development among its member states.

It was established in 1961, with 38 member countries spanning the world, from North America and South America to Europe and Asia-Pacific.

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Joseph Priestly discovered oxygen on August 1, 1774.

The most abundant element in the Earth's crust is oxygen, making up 46.6% of Earth's mass

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Niagara Falls is a group of three waterfalls at the southern end of Niagara Gorge, spanning the border between the province of Ontario in Canada and the state of New York in the United States.

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Kofi Annan served as the Secretary-General of the United Nations from 1997 to 2006, before Ban Ki-Moon took office in 2007.

He was a diplomat from Ghana.

On 13 October 2006, he was elected as the eighth secretary-general by the United Nations General Assembly

On 1 January 2007, he succeeded Kofi Annan.

Ban Ki-Moon  serves as the eighth Secretary-General until 2016.

He belongs to the Republic of Korea 

ND5-07-2023

Explanation

John McCarthy is recognized as the father of Artificial Intelligence due to his astounding contribution in the field of Computer Science.

John McCarthy was an American computer scientist

Note: Artificial Intelligence is a branch of Computer science, which aims to create intelligent machines so that machine can think intelligently in the same manner as a human does.

Explanation

Freestyle swimming (front crawl) is the fastest swimming technique due to its continuous arm movement and efficient kicking.

It is commonly used in competitive swimming for speed and efficiency.

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