Building Materials
Assertion A : Normally turpentine oil is recommended as thinner for indoor painting.Reason R : Turpentine oil is costlier than other thinners.Select your answer according to the coding system given below:

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

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Building Materials
Sapwood consists of

Portion of timber between heartwood and cambium layer
Innermost annular rings around the pith
Thin fibre which extends from the pith outwards and holds the annular rings together
Thin layers below the bark

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