Q. What was the major trans-regional route towards the northern part of India called in the 6th century BCE?
Answer: Uttarapatha
Notes:

The two major trans-regional routes of the 6th century were known as Uttarapatha and Dakshinapatha. Uttarapatha for northern India which stretched from the north-west across the Indo-Gangetic plains to the port city of Tamralipti on the Bay of Bengal.

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