The staple commodities of export by the English East India Company from Bengal in the middle of the 18th century were

Explanation

The East India Company was originally formed in Britain for pursuing trade with the East Indies in Southeast Asia. In fact, it ended up trading mainly with the Indian subcontinent and China, where the main items of trade were cotton, silk, tea, opium, and saltpetre (potassium nitrate). Source: https://en.wikipedia.org/wiki/East_India_Company