Correct Answer: (b) 1833
Solution:In 1833, the monopoly of China trade was lost by East India company. In the late seventeenth century the East India Company shifted its attention in East Asia to China. Tea, silk, and porcelain were the main exports from China; silver, Bengal cotton, and, eventually, opium (traded indirectly) were the company's principal exports. The Charter Act, 1813, with the rising demand of English traders in share of Indian trade the company was deprived with trade monopolies, however was allowed to enjoy the monopoly of trade with China and trade in tea. With the Act of 1833 there was a complete abolishment of companies trade monopoly.