________________ is the hardest material out of the following ?
Correct answer: A. Boron carbide
- A. Boron carbide
- B. Tungsten carbide
- C. Hardened steel
- D. Silicon carbide
Explanation
Boron carbide is commonly regarded as the hardest of these engineering materials, with hardness close to that of diamond. Tungsten carbide, hardened steel, and silicon carbide are also hard but generally rank below it in this comparison.
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