Official Answer Key & Detailed Solution
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Correct Answer: Option (D) — 1, 2, 3, 4 and 5
Concept & Option Breakdown
Standard Reference Verified1 is correct: 3D food printers construct intricate edible geometries from chocolate, sugar, and food pastes. 2 is correct: Tissue engineering utilizes 3D bioprinting combined with electronics to fabricate functional bionic organs such as ears. 3 is correct: The automotive industry utilizes 3D printing for rapid prototyping, lightweight components, and custom tooling. 4 is correct: In reconstructive surgery, patient-specific 3D printed implants and prosthetics match exact anatomical structures. 5 is correct: 3D printing is utilized in hardware processing technologies (e.g., printed electronics, physical data visualization, and micro-sensors).
For open-ended 'applications of technology' questions in UPSC Prelims, broad inclusive options (all of the above) are consistently the correct choice.
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