What is the main function of Blockchain technology? MCQ with Answer and Explanation

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What is the main function of Blockchain technology?

A. High-speed internet

B. Image processing

C. Secure decentralized ledger

D. Weather forecasting

Answer: Option C

Solution (By JKSSB Mock Tests)

Blockchain provides secure, transparent, and tamper-proof records.

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India's first test tube baby was born in which city?

A. Kolkata

B. Mumbai

C. Chennai

D. Delhi

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Correct Answer: Option A

Explanation:
Durga (Harsha) was born in Kolkata in 1986.

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Question #2

Which element has the atomic number 1?

A. Carbon

B. Hydrogen

C. Oxygen

D. Helium

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Correct Answer: Option B

Explanation:
Hydrogen is the lightest element and sits at the first position in the periodic table.

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Question #3

What is the most abundant gas in the Earth's atmosphere?

A. Oxygen

B. Carbon Dioxide

C. Hydrogen

D. Nitrogen

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Correct Answer: Option D

Explanation:
Nitrogen makes up about 78% of Earth's atmosphere.

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