Building Materials
Sandstone is a (i) Sedimentary rock (ii) Aqueous rock (iii) Siliceous rock

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

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Building Materials
Rapid hardening cement attains early strength due to

Excess percentage of gypsum
Larger proportion of lime grounded finer than normal cement
Lesser proportion of lime grounded finer than normal cement
Lesser proportion of lime grounded coarser than normal cement

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