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__________ is the hardest material out of the following.

A. Boron carbide

B. Tungsten carbide

C. Hardened steel

D. Silicon carbide

Please do not use chat terms. Example: avoid using "grt" instead of "great".

You can do it
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  11. Which one can be directly solidified from gaseous state without entering into liquid state?
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  15. Percentage of differential pressure lost in a Venturimeter with a tapering of 15° may be about
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  18. Eutectoid composition of carbon steel at room temperature is
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  20. Which of the following is an unconventional source of energy?
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  24. Preheating before welding is done to
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