When reference to carbon nanotubes, consider the following statements:1. They can be used as carriers of drugs and antigens in the human body.2. They can be made into artificial blood capillaries for an injured part of the human body.3. They can be used in biochemical sensors.4. Carbon nanotubes are biodegradable.Which of the statements given above are correct?
✓ Correct answer: c) 1, 3 and 4 only
ExplanationCarbon nanotubes are cylindrical structures made of carbon atoms arranged in a hexagonal lattice.They possess exceptional strength, high electrical conductivity, and unique mechanical properties, making them promising materials for applications in electronics, materials science, and nanotechnology.Statement 1 is correct: Carbon nanotubes (CNTs) have been widely researched for their role in drug delivery systems.Their unique hollow structure allows them to transport therapeutic molecules directly to targeted cells, improving treatment precision and effectiveness.Functionalization of CNTs enhances biocompatibility and minimizes toxicity.Statement 2 is incorrect: Carbon nanotubes have applications in tissue engineering, including constructing artificial blood vessels.Their mechanical strength and ability to support cell growth make them useful for creating scaffolds that mimic natural capillaries, promoting tissue repair.However, UPSC in its official answer key has not given recognition to this development and marked statement 2 as incorrect.Statement 3 is correct: Due to their
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