Building Materials
Which of the following represents a metamorphic rock? (i) Slate (ii) Shale (iii) Quartzite

Both (ii) and (iii)
Both (i) and (iii)
All (i), (ii) and (iii)
Only (iii)

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Building Materials
Assertion A : Pure lime takes a long time to develop adequate strength.Reason R : Pure lime has slow hardening characteristics.Select your answer according to the coding system given below:

Both A and R is true and R is not a correct explanation of A
Both A and R is true and R is correct explanation of A
A is true but R is false
A is false but R is true

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