Answer: (D)
Explanation:
What is preventive detention?
Preventive detention means detention of a person by the state without trial and conviction by court, but merely on suspicion. The detention could be up to a year unless extended.
A pre-trial detention is not the same as preventive detention. While the former is an under trial accused of a crime, a detainee can be taken into custody just as a preventive measure even if he has not committed a crime.
What are the powers of the state?
Article 22 prescribes protection against arrest and detention but has a major exception. It says in Article 22 (3) (b) that none of those safeguards apply “to any person who is arrested or detained under any law providing for preventive detention.” The remaining clauses — Article 22(4)-(7) — deal with how preventive detention operationalises.

Answer: (D)
Explanation:
Soon after the formation of the United Nations, it passed a resolution to commit to the elimination of nuclear weapons in 1946. In 1948, it created the World Health Organisation (WHO) to deal with communicable diseases like smallpox, malaria, HIV. At present the WHO is the apex organisation dealing with the coronavirus pandemic.
In 1950, the UN created the High Commissioner for Refugees to take care of the millions who had been displaced due to World War II. It continues to be on the frontlines of crises faced by refugees from countries across the world. In 1972, the UN environment programme was created. More recently in 2002, the UN established the UN criminal court to try those who have committed war crimes, genocide, and other atrocities.

Answer: (D)
Explanation:
China to build the world’s largest ‘ghost particle’ detector.
Neutrinos are a type of electron but, like neutrons, they do not have any charge. They are among the most abundant particles in our universe — with trillions of neutrinos passing through you at any given second — and also among the tiniest.
Neutrinos were long believed to be massless, until scientists found evidence that they do have a very small mass.
Neutrinos’ weak charge and almost nonexistent mass have made them notoriously difficult for scientists to observe. They can only been “seen” when they interact with other particles.
The rarity of interactions with other particles makes them almost impossible to track. That’s why they’re called ghost particles — the vast majority skirt around undetected.
How do scientists detect ghost particles?
Ghost particles rarely interact with other particles. But rarely doesn’t mean “never”. Sometimes they interact with water molecules, which is why China is building its ghost molecule telescope underwater.
Right now, the largest neutrino-detecting telescope is the University of Madison-Wisconson’s “IceCube” telescope. Situated deep in the Antarctic, the telescope’s sensors span around 1 cubic kilometer. China says its new telescope, called “Trident”, will span 7.5 cubic kilometers in the South China Sea.

Answer: (C)
Explanation:
City Gas Distribution (CGD) networks are an interconnected system of underground natural gas pipelines for supplying Piped Natural Gas (PNG) and Compressed Natural Gas (CNG). While the CNG is predominantly used as auto-fuel, the PNG is used in domestic, commercial and Industrial segments These networks are part of the government’s efforts to promote sustainable growth and to reduce greenhouse gas emissions and pollution. From just 66 districts in 2014, CGD network covers 630 districts in 2023; taking the number of domestic PNG connections from merely 25.40 lakhs in 2014 to a whopping 103.93 lakhs in 2023.