बिहार के जिलों में सर्वाधिक कुल सिंचित क्षेत्रफल किस जिले की है ? - Which district has the largest total irrigated area among the districts of Bihar? - Bihar Ke Zilon Me Sarwaadhik Kul Sinchit Shetrafal Kis Jile Ki Hai ? Bihar Gk in hindi, Canals and Irrigation Nalanda question answers in hindi pdf Gaya questions in hindi, Know About Bhojpur Bihar Gk online test Bihar Gk notes in hindi quiz book Rohtas