The lime which contains more than 30% of clayey impurities in the form of silica, alumina and iron oxide, is known as

The lime which contains more than 30% of clayey impurities in the form

1.	The lime which contains more than 30% of clayey impurities in the form of silica, alumina and iron oxide, is known as
A.	poor lime
B.	rich lime
C.	hydraulic lime
D.	limestone
Answer» B.