Pick up the correct statement from the following:

Upto a maximum of 72% of iron, is available in

Quick lime

Duco is one of the patent forms of

The commonly used colour pigment in paints, is

A 1st class brick immersed in water for 24 hours, should not absorb water (by weight) more than

Expanded metal is

For lime concrete,

A piece of timber whose thickness and width are respectively 5 cm and 10 cm is called