ऑपरेशन फ्लड कब से चलायी जा रही हैं ? - How long has Operation Flood been in operation? - Operation Flood Kab Se Chalayi Jaa Rahi Hain ? UP GK in hindi, मिट्टी कृषि एवं पशुपालन 1971 - 72 question answers in hindi pdf 1972 - 73 questions in hindi, Know About 1970 - 71 UP GK online test UP GK notes in hindi quiz book 1974 - 75