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.

The correct order of the sentences to form a meaningful and coherent paragraph is DCAB.

Let us analyze the logical connection between the sentences to understand why this order is correct:
1. Sentence D ("Production of Wootz steel required a highly specialised technique of refining iron.") introduces the main subject—the specialized technique of refining iron to produce Wootz steel. This serves as an excellent opening sentence for the paragraph.
2. Sentence C ("But iron smelting in India was extremely common till the end of the nineteenth century.") introduces a contrasting detail using the conjunction "But", showing that despite the highly specialized technique required (as mentioned in D), iron smelting was widespread in India. Thus, C logically follows D.
3. Sentence A ("In Bihar and Central India, in particular, every district had smelters that used local deposits of ore to produce iron...") provides specific geographic details and examples supporting the claim in sentence C about how common iron smelting was. Therefore, A follows C.
4. Sentence B ("The smelting was done by men while women worked on the bellows...") elaborates on the division of labor during the smelting process mentioned in sentence A. This makes B the perfect concluding sentence of the sequence.

Hence, the logical flow of the paragraph is D → C → A → B, which corresponds to the option DCAB.