Sentences of a paragraph are given below in jumbled order. Arrange the sentences in the correct order to form a meaningful and coherent paragraph.

A. In Bihar and Central India, in particular, every district had smelters that used local deposits of ore to produce iron which was widely used for the manufacture of implements and tools of daily use.

B. The smelting was done by men while women worked on the bellows, pumping air that kept the charcoal burning.

C. But iron smelting in India was extremely common till the end of the nineteenth century.

D. Production of Wootz steel required a highly specialised technique of refining iron.