Bihar Gk- Kosi Pariyojana Kab Bankar Taiyaar Hui ?

Q.14285: कोसी परियोजना कब बनकर तैयार हुई ?
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कोसी परियोजना कब बनकर तैयार हुई ? - When was the Kosi project prepared? - Kosi Pariyojana Kab Bankar Taiyaar Hui ? Bihar Gk in hindi,  Canals and Irrigation 1956 Me question answers in hindi pdf  1960 Me questions in hindi, Know About 1952 Me Bihar Gk online test Bihar Gk notes in hindi quiz book    1965 Me