Building Materials
Assertion A : Paints with white lead base are not recommended for painting of iron works.Reason R : Paints with white lead base do not check rusting of iron.Select your answer according to the coding system given below:

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

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Building Materials
Asbestos

Is a natural fibrous mineral substance
Contains iron oxide and alumina
Is composed of hydrous silicates of calcium and magnesium (CaSiO3, 3MgSiO3)
All of these

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