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Question
Pick up the correct statement from the following:
Options:
A .  The free quartz suddenly expands at a temperature lower than 600°C
B .  The lime stone resists fire upto about 800°C and at higher temperature it splits into CaO and CO₂
C .  The sand stone with silicates resist a fire in a better way
D .  All the above.
Answer: Option D
Answer: (d).All the above.

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