For explanation and discussion, https://www.youtube.com/@geodemyinstitute/playlists

With reference to the SpaDeX (Space Docking Experiment) mission, recently in news, consider the following statements.
1. India became the second country in the world to conduct an autonomous satellite docking experiment in space.
2. The mission was launched using the PSLV-C60 rocket.
3. The experiment involved docking and undocking between two small satellites in orbit.
4. The primary objective of SpaDeX is to test weaponized space technology for strategic applications.
How many of the above statements are correct?

Which of the following statements are correct regarding rare earth elements?
1. Rare earth elements are a series of 17 substances that are present in the earth’s crust.
2. Unlike what the name may indicate, rare earths occur plentifully in nature, but the rarity comes from the ability to isolate them chemically.

Rare earth elements are essential materials in which of the following sectors?
1. Hard discs industry
2. Super conductors
3. Cancer treatment

How many of the following countries are boundaries of Sudan?
1. Central African Republic
2. Congo
3. Ethiopia
4. Libya 
5. Chad
6. Somalia
7. Niger