Explanations:The British Empire established several trading posts in India during the colonial period, but Calcutta (now known as Kolkata) was one of the most significant. The British East India Company first established a trading post in Calcutta in 1690, and it quickly grew to become a major center for trade, commerce, and administration. By the mid-18th century, Calcutta had become the capital of British India, a position it held until 1911 when the capital was moved to Delhi.
Calcutta's strategic location on the Hooghly River, a distributary of the Ganges, made it an ideal trading hub. The city was a key point for the export of goods such as cotton, silk, and indigo, and it also served as a gateway for the import of goods from Europe. The British East India Company's control over Calcutta allowed them to expand their influence across the Indian subcontinent, and the city became a symbol of British power and wealth in India.
While other locations like Goa, Macao, and Singapore were also important trading centers, they were not as significant as Calcutta in the context of British colonial India. Goa was a Portuguese colony, Macao was a Portuguese and later Chinese territory, and Singapore was a British colony but located in Southeast Asia, not India. Therefore, Calcutta stands out as the major trading post in India under British control.