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:

The hardest rock is

Soundness of cement is tested by

A good building stone should not absorb water more than

The cast iron when heated to red heat with powdered red haematite in an oven for increasing its toughness, is converted …

The most commonly used retarder in cement is

A queen closer is a

The slag which floats on the surface of the molten iron generally contains

Asbestos . . . . . . . .