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High refractoriness of a material refers to its __________

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High refractoriness of a material refers to its __________

(a) Slipperyness of the material

(b) Chemical strength towards other material

(c) Strength to withstand at high temperature

(d) Ability to get dissolved in molten metal

I had been asked this question during an online exam.

This question is from Mold Materials topic in section Molding and Core Sands of Casting-Forming-Welding I

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The correct option is (c) Strength to withstand at high temperature

To explain: Refractoriness is the resistance to self deformation at high working temperatures. A material must possess such property in order to withstand the temperature of molten metal during casting.

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