The United Nations Conference on Environment and Development (UNCED) that was held in Brazil in 1992 is known as:

Correct option is C

The correct answer is (C) Earth Summit

Explanation:
The United Nations Conference on Environment and Development (UNCED) held in Brazil in 1992 is known as the Earth Summit. It focused on sustainable development and environmental issues globally.

Incorrect Options Explanation:

• BRICS Summit: A summit for Brazil, Russia, India, China, and South Africa, unrelated to environmental issues.
• N S Summit: No such environmental summit.
• G-20 Summit: Focuses on global economic issues, not specifically on the environment.

Information Booster:

• Earth Summit (1992):
  • Held in Rio de Janeiro, Brazil.
  • Key agreements: Agenda 21 for sustainable development, Convention on Biological Diversity, and the Framework Convention on Climate Change.
• UNCED's Impact: Paved the way for global cooperation on environmental issues and set the stage for the Kyoto Protocol and Paris Agreement.