[1]. Recently, scientists discovered an eco-friendly method to recycle toxic perovskite solar cells (PSCs), which could contribute to more sustainable energy solutions. What is the primary material used in perovskite solar cell?

[A]. Lead

[B]. Tin

[C]. Calcium titanium oxide

[D]. Both a and b

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[2]. Recently, the Kokborok Sahitya Parishad called for the inclusion of Kokborok in the Eighth Schedule of the Indian Constitution. Who are the native speakers of Kokborok?

[A]. Bodos

[B]. Tripuris

[C]. Nagas

[D]. Mizos

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[3]. Recently, the price of 24-carat gold surged to Rs 1 lakh per 10 grams in India. Which of the following is NOT a factor driving this surge in gold prices?

[A]. Geopolitical tensions

[B]. Rising interest rates

[C]. Weakening of the US dollar

[D]. Central bank accumulation of gold

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[4]. Recently, the Direct Benefit Transfer (DBT) initiative improved welfare delivery efficiency. What does the Welfare Efficiency Index (WEI) measure?

[A]. Impact of subsidy reduction

[B]. Growth in beneficiaries

[C]. Food subsidy distribution

[D]. Impact of DBT system

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[5]. The Surat Emission Trading Scheme (ETS), launched in 2019, has been successful in controlling which type of pollution?

[A]. Greenhouse gas emissions

[B]. Water pollution

[C]. Particulate matter emissions

[D]. Noise pollution

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