The largest planet in our Solar System is identified by comparing the sizes (diameters) of all eight planets.

The four largest planets are all gas giants: Jupiter, Saturn, Uranus, and Neptune. The terrestrial planets (Mercury, Venus, Earth, Mars) are much smaller.

Jupiter has a diameter of approximately 142,984 km, which is significantly larger than Saturn (120,536 km), Uranus (50,724 km), and Neptune (49,244 km).

Jupiter's diameter is about 11 times larger than Earth's diameter. It is so massive that all other planets combined could fit inside it.

Therefore, the answer is B) Jupiter — the largest planet in our Solar System.

The United Nations headquarters is the primary administrative center from where the UN conducts its global operations and diplomatic activities.

We need to know the location of the main headquarters of the United Nations organization.

- Geneva: Houses UN offices and the European headquarters

- New York: The primary headquarters where the UN General Assembly and Security Council meet

- London: Historical significance but not current headquarters

- Paris: UNESCO headquarters, not the main UN office

The United Nations headquarters was established in New York in 1952 and remains the official seat of the UN General Assembly, Security Council, and Secretariat.

Therefore, the answer is B) New York

The FIFA World Cup 2022 was held in Qatar and is a major international football tournament held every 4 years.

Therefore, Argentina won FIFA World Cup 2022.

The answer is (B) Argentina.

Chemical symbols are derived from the Latin or Greek names of elements, not always from their English names.

Gold is a precious metal with atomic number 79, widely used in jewelry and electronics.

The Latin name for Gold is "Aurum", which is why its chemical symbol is derived from the first two letters of this Latin word.

The chemical symbol for Gold is Au (from Aurum in Latin).

- Gd is the symbol for Gadolinium

- Go is not a valid chemical symbol

- Ag is the symbol for Silver (from Latin "Argentum")

Therefore, the answer is C) Au

The Indian National Anthem "Jana Gana Mana" was written by Rabindranath Tagore.

Therefore, the correct answer is (B) Rabindranath Tagore.

Canberra is the capital city of Australia, purpose-built as the nation's federal capital.

The question asks for the capital of Australia, not its largest or most famous city.

Sydney and Melbourne are Australia's largest and most well-known cities respectively, but neither is the capital. This is a common point of confusion.

Canberra was specially constructed in 1927 as a compromise between rival cities Sydney and Melbourne. It was chosen as a neutral location for Australia's Parliament and seat of government, located in the Australian Capital Territory (ACT).

Therefore, the answer is C) Canberra

The telephone was invented by Alexander Graham Bell, a Scottish-born inventor living in Canada who patented this revolutionary communication device in 1876.

Therefore, the answer is B) Alexander Graham Bell — the inventor of the telephone.

The Pacific Ocean is the largest ocean on Earth by surface area and volume.

- Atlantic Ocean: ~106 million sq km

- Indian Ocean: ~70 million sq km

- Arctic Ocean: ~14 million sq km

Therefore, the answer is (C) Pacific Ocean.

Mount Everest is the world's highest mountain peak, and its geographical location spans multiple countries along the Himalayas.

Mount Everest is situated in the Himalayan mountain range in South Asia.

Mount Everest stands on the border between Nepal and Tibet (China). However, the main base camps and the most commonly used climbing route approach the mountain from Nepal's side.

While the mountain technically straddles the Nepal-China border, Nepal is credited as the primary location because the South Col route (the most popular climbing route) originates from Nepal. The summit can be reached from both the Nepal side and the Tibet side.

Therefore, the answer is C) Nepal.

Note: This is a geography convention question. The answer may vary slightly based on the source, but Indian competitive exams typically mark C) Nepal as the standard answer for Mount Everest's location.

The Earth's atmosphere is composed of different gases in specific proportions, and nitrogen is the most abundant among them.

The atmosphere consists mainly of nitrogen (N₂), oxygen (O₂), argon (Ar), carbon dioxide (CO₂), and trace gases.

Nitrogen makes up approximately 78% of the atmosphere, oxygen about 21%, argon about 0.93%, and carbon dioxide only about 0.04%.

Since 78% is the highest percentage, nitrogen is the most abundant gas in the atmosphere.

Note: Oxygen is the second most abundant gas. This is a fundamental atmospheric science fact that appears frequently in competitive exams.

Therefore, the correct answer is C) Nitrogen