Answer:
Delhi
Step-by-step explanation:
Bombay, Calcutta, and Madras were located near the ocean, which made them a desirable location for trading ports.
Bombay became the main trade destination for the countries on the west side of India, (such as African countries and western Europe)
Calcutta became the main trade destination for countries on the south side of India (East Asian countries)
and Madras became the main trade destination for the countries on east side of India (countries in South East Asia)