Pick up the most favourable condition for the rapid growth of fungus for dry rot from the following:

Quartzite, a metamorphic stone is

Asbestos cement

Non acid-resistant asbestos is :

If the ore impurities is

Expanded metal is

If water required for 1 bag of cement is 30 litres, the water cement ratio is :

In a rock calcium carbonate predominates. State whether it is :

Commonly used thinner in