The correct option is 2 only
Explanation
The introduction of railways in India in the mid-19th century was a pivotal moment in the country's economic history, fundamentally altering transport, trade, and agricultural patterns under British rule.
Statement 1 is Correct. The railways were introduced primarily to serve British colonial interests. The main objectives were to facilitate the movement of raw materials from the hinterland to the ports for export to Britain, to distribute British manufactured goods throughout India, and to enable the rapid mobilization of troops and administrative control across the subcontinent.
Statement 2 is Incorrect. Far from halting it, the railways significantly accelerated the commercialisation of Indian agriculture. By linking interior regions to international markets via ports, farmers began shifting from subsistence crops to cash crops (like cotton, jute, and indigo) intended for export. This integrated the Indian agricultural sector into the global market.
Statement 3 is Incorrect. The development of railways did not result in an economic surplus for the Indian exchequer. Instead, it contributed to the "Drain of Wealth." The railways were built using British capital under a system of "guaranteed interest," where the colonial government assured a minimum return (usually 5%) to British investors, paid out of Indian tax revenues. This resulted in a significant financial burden on the Indian economy rather than a surplus.
Key Takeaway: The development of railways in colonial India was structured to serve imperial economic and strategic interests, fostering the commercialisation of agriculture while contributing to the economic drain through guaranteed interest payments.