Ancient & Medieval History · Mahajanapadas & the Rise of Magadha
The concept being tested: Geographic regions and rivers of pre-Mauryan India (600-322 BC).
With reference to ancient India (600-322 BC), consider the following pairs: Territorial region / River flowing in the region — I. Asmaka : Godavari II. Kamboja : Vipas III. Avanti : Mahanadi IV. Kosala : Sarayu How many of the pairs given above are correctly matched?
Asmaka, one of the sixteen mahajanapadas, lay in the Godavari valley in the Deccan (roughly the Nashik-Aurangabad tract) — the Asmaka-Godavari pairing is correct. Kosala, centred on Shravasti and Ayodhya in the mid-Gangetic plain, was drained by the Sarayu — also correct. Kamboja, however, sat in the far northwest around the Hindukush-Pamir tract and is associated with rivers such as the Kunar, not the Vipasha (Beas), which is a Punjab river tied to the Trigarta-Kekaya region instead — so Kamboja-Vipas is a mismatch. Avanti's capital Ujjaini stood on the Kshipra in Malwa, while the Mahanadi runs far to the east through Kalinga; Avanti-Mahanadi is wrong too. With only Asmaka-Godavari and Kosala-Sarayu holding up, exactly two pairs are correctly matched.
What UPSC was testing
UPSC is testing precise mahajanapada-to-river geography rather than general familiarity with the names — the trap pairs Kamboja and Avanti with rivers from entirely different, non-adjacent regions (Punjab and Kalinga respectively), which aspirants who know the janapada names but not their exact river drainage tend to wave through as plausible.
How often this comes up
This concept has appeared 8 times in UPSC Prelims General Studies Paper I between 2015 and 2025 — in 2017, 2019, 2021, 2022, 2023, 2024 and 2025.
The option-by-option autopsy for this question — why each of the other three is wrong, and which neighbouring concept each one was built from — is in the app.