The correct answer is option 1 i.e Christmas.

• Christmas is both a deeply religious occasion marking the birth of Jesus Christ and a widely celebrated cultural festival.
• It encompasses a range of traditions and customs that reflect the values of love, joy, and generosity.
• Hope and Salvation: Christmas symbolizes hope, redemption, and the promise of salvation. Christians believe that Jesus's birth brought light into a world of darkness and offered a path to eternal life through his teachings and sacrifice.
• Peace and Goodwill: The message of Christmas emphasizes peace, goodwill, and love among people. The angels’ announcement to the shepherds included the message of “peace on earth, goodwill toward men.”

The correct answer is option 1 i.e. 8th.

The 8th Uttarakhand Bird Festival was recently organised at Benog Wildlife Sanctuary, Mussoorie. A total of 95 bird species and 22 butterfly species were recorded during the festival. Some of the notable sightings during the festival were Yellow rumped Honeyguide, Long-tailed Broadbill and Wall creeper. The festival aims to generate awareness to protect avian habitats.

The correct answer is option 2 i.e. UNESCO and WFP.

The first comprehensive survey of Lake Turkana in 50 years, led by UNESCO and WFP with Dutch Government funding, highlights the lake’s high fish potential. Located in northern Kenya, Lake Turkana is Africa’s fourth-largest lake and the largest permanent desert lake globally. Despite its unique biodiversity and cultural significance, it remains one of Africa's least studied lakes. The survey reveals challenges due to semi-saline waters, high evaporation, and fluctuating levels, which have impeded past commercial fishing efforts and sustainable development.

The correct answer is option 2 i.e. T90 Bhishma.

The Indian Army in a move towards self-reliance or Aatmabirbhar Bharat recently rolled out its first Overhauled T-90 Bhishma Tank. It has been the Indian Army's main battle tank since 2003 known for its firepower, speed and protection. The tank has an advanced thermal sighting system and can detect targets up to 8 kilometres. The tank can accommodate a total of three people including Commander, Gunner and Driver. The overhauling of the battle tank was conducted by the Corps of Electronics and Mechanical Engineers.

The correct answer is option 2 i.e. Harriotta avia.

Scientists in New Zealand have identified a new species of "ghost shark" called Harriotta avia. This mysterious fish, which is related to sharks and rays, lives in the deep Pacific at depths of up to 2,600 metres. Dr. Brit Finucci, a member of the research team, expressed enthusiasm about the discovery, noting the species' unique long snout. Initially thought to be a widespread species, it was later confirmed to be exclusive to Australian and New Zealand waters, highlighting the significance of such findings for marine conservation efforts.

The correct answer is  option 1 i.e. Rubidium.

• In July 2018, an experiment aboard the International Space Station (ISS) cooled a cloud of atoms of the chemical element rubidium to one ten-millionth of one kelvin above absolute zero, forming a Bose-Einstein Condensate (BEC) in space.
• This experiment, known as the Cold Atom Laboratory (CAL), aimed to study the behavior of ultra-cold quantum gases in microgravity conditions.

The correct answer is option 2 i.e. Philipp Lenard.

• Philipp Lenard, a German physicist, conducted the experiment in the late 19th century. He observed that a glass tube filled with a low-pressure gas emitted radiation when a voltage was applied between two metal plates. This phenomenon, known as the Lenard tube experiment, contributed to the understanding of cathode rays and the discovery of electrons.
• Philipp Lenard was awarded the Nobel Prize in Physics in 1905 for his work on cathode rays.

The correct answer is option 1 i.e. 3600 KJ/h.

Actually, 1 kilowatt (kW) is equivalent to 3.6 megajoules per hour (MJ/h), not 3600 kilojoules per hour (kJ/h).

Here's the conversion:

1 kilowatt (kW) = 1000 watts (W)

1 kilojoule (kJ) = 1000 joules (J)

So, 1 kilowatt = 1000 joules per second (Watt definition)

= 1000 joules per second × 3600 seconds

= 3600 kilojoules per hour (kJ/h)

So, 1 kilowatt is equivalent to 3600 kilojoules per hour (kJ/h), not 3600 kJ/h.

The correct answer is option 1 i.e. n = 4, I = 3, m = +1, s = +1/2.

For an electron in a 4f orbital, the four quantum numbers are:

1. Principal Quantum Number (n): 4
2. Azimuthal Quantum Number (l): 3 (for f orbitals)
3. Magnetic Quantum Number (mₗ): Ranges from -3 to +3, so possible values are -3, -2, -1, 0, +1, +2, +3.
4. Spin Quantum Number (mₛ): Can be either +1/2 or -1/2, indicating the electron's spin direction.

The correct answer is option 3 i.e. Galileo.

• By observing the motion of objects on an inclined plane, Galileo Galilei deduced that objects move with a constant speed when no force acts on them.
• Galileo's experiments with inclined planes were crucial in developing the concept of inertia, which states that an object will remain at rest or move with constant velocity unless acted upon by an external force.
• This concept laid the foundation for Newton's laws of motion and had a profound impact on the development of classical mechanics.