The correct answer is ​2 and 4. Key Points Danish East India Company established their first factory at Tranquebar in Tamilnadu (1620) and Serampur in Bengal (1676). In India, Serampore was their headquarter. Hence Pair 2 is Correct. Portuguese were the first Europeans to start trade with India. Vasco da Gama of Portugal discovered a new sea route via the Cape of Good Hope to India. In India Portuguese, established its trading settlements at Goa, Cochin, and Diu & Daman. Hence, Pair 4 is Correct. After Portuguese, Dutch entered India followed by English and French. In 1600 British East India Company was formed and established their factory in 1608 at Surat. Hence, Pair 1 is NOT correct. Jahangir accepted the proposal and the company created trading posts in Surat (where a factory was built in 1613), Madras (1639), Bombay (1668), and Calcutta (1690). The first permanent trading post of the Dutch East India Company was in Indonesia. In India, they established the first factory in Masulipattanam in 1605, followed by Pulicat in 1610, Surat in 1616, Bimilipatam in 1641, and Chinsura in 1653. Hence, Pair 4 is NOT correct.