Which element is commonly used in light bulb filaments? MCQ with Answer and Explanation

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Which element is commonly used in light bulb filaments?

A. Copper

B. Silver

C. Tungsten

D. Gold

Answer: Option C

Solution (By JKSSB Mock Tests)

Tungsten has a very high melting point, making it perfect for light bulb filaments.

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Which blood group is known as the 'Universal Donor'?

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C. AB+

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Correct Answer: Option A

Explanation:
O-negative blood lacks A, B, and Rh antigens, making it the universal donor.

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What is the primary goal of the Human Genome Project?

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Correct Answer: Option C

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It sequenced the entire human genome.

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Which technology allows the transmission of data through light?

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Explanation:
Li-Fi (Light Fidelity) uses light waves from LED bulbs to transmit data at high speeds.

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