The correct answer is: C. Saltpetre
The Danish East India Company built a factory in Patna in 1774 for the trading of saltpetre. Saltpetre is a mineral that is used in the manufacture of gunpowder. It is also used in the production of fertilizers and explosives.
The Danish East India Company was a trading company that was founded in 1616. The company was granted a monopoly on trade with India by the Danish king. The company operated for over 200 years and played an important role in the development of Danish trade and commerce.
The Danish East India Company built a number of factories in India, including the one in Patna. The factory in Patna was built to trade in saltpetre, which was a valuable commodity at the time. The
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