(d) None
Green hydrogen is a type of hydrogen produced through electrolysis, which uses renewable energy sources like wind or solar power. It separates water (HO) into its constituent elements, hydrogen (H) and oxygen (O), with zero greenhouse gas emissions. Green hydrogen is colorless, odorless, tasteless, non-toxic, and highly combustible. It can be stored and used as fuel across transportation, industry, and agricultural sectors.
Blue hydrogen: Produced using electricity generated by burning fossil fuels, but paired with carbon capture and storage (CCS) technologies, which prevent GHGs from entering the atmosphere.
Green hydrogen is currently two or three times more expensive than blue hydrogen, but with advancements in science and technology, it is expected to become a cheap fuel in the future.

National Hydrogen Mission aims to cut down carbon emissions and increase the use of renewable sources of energy while aligning India’s efforts with global best practices in technology, policy, and regulation.
The Government of India has allotted Rs 25 crore in the Union Budget 2021–22 for the research and development in hydrogen energy and intends to produce three-fourths of its hydrogen from renewable resources by 2050.

(d) Neither 1 nor 2
An electroencephalogram (EEG) is a medical test that measures the electrical activity in the brain. It’s used to help diagnose a number of conditions, including:
Epilepsy, Sleep disorders, Brain tumors, Brain damage from head injury, Brain dysfunction, Inflammation of the brain, Stroke, Alzheimer’s disease, Certain psychoses, and Narcolepsy. (Statement 1 is incorrect)
ECGs are indispensable in diagnosing heart attacks, scientifically known as myocardial infarctions. The test helps identify specific changes in the heart’s electrical pattern, known as ST-segment elevation or depression, which indicate reduced blood flow to the heart muscle. (Statement 2 is incorrect)

(b) A type of cyber attack
Juice jacking is a type of cyber-attack in which malicious actors use public charging stations or compromised USB ports to install malware or steal data from smartphones, tablets, or other electronic devices. When users connect their devices to these charging ports, they unknowingly allow hackers to access their devices data or even install malicious software without their knowledge.
Recently, the Computer Emergency Response Team (CERT-In) has issued a warning regarding the potential misuse of public charging ports found in locations such as cafes, hotels, and airports.

(c) All three
Carbon credits, also known as carbon offsets, are permits that allow the owner to emit a certain amount of carbon dioxide or other greenhouse gases.
One credit permits the emission of one ton of carbon dioxide or the equivalent in other greenhouse gases.
Companies that pollute are awarded credits that allow them to continue to pollute up to a certain limit, which is reduced periodically.
Meanwhile, the company may sell any unneeded credits to another company that needs them.
Green Credits Initiative:
This initiative involves creating an inventory of degraded wastelands, which can be utilized for planting by individuals and organizations.
Participants undertaking environmentally positive actions will receive tradable green credits.
The entire process, from registration to plantation, verification, and issuance of green credits, will be digitized. The portal will collect ideas, knowledge, and experiences related to tree planting and environmental conservation.

(c) North-East monsoon
Tamil Nadu’s winter rainfall is mostly due to the northeast trade winds, also known as the northeast monsoon. During the winter, these winds bring moisture from the Bay of Bengal to Tamil Nadu.
The northeast monsoon contributes 48% of Tamil Nadu’s total annual rainfall, while the southwest monsoon contributes 32%. The state’s water resources and agriculture depend on these rains.
• Western disturbances (WDs) are extratropical storms that originate in the Mediterranean region and can bring sudden winter rain to the northwestern parts of the Indian subcontinent.
• The South-West monsoon, also known as the summer monsoon, is a season that brings heavy rainfall to India from June to September. It begins over Kerala around June 1, then advances northwards, usually in surges, and covers the entire country around July 15. The monsoon occurs when winds blow from sea to land.
• The southeast monsoon can be seen from the Arabian Sea to the Bay of Bengal. The southern part of India, especially Andhra Pradesh and Tamil Nadu, receives rainfall during the northeast monsoon. The southwest monsoon and the northeast monsoon are monsoons with different timings.