बिहार स्थित बरौनी तेलशोधक कारखाने का निर्माण किस पंचवर्षीय योजना काल में हुआ ? - In which five year plan period the Barauni oil refinery in Bihar was built? - Bihar Sthit Barauni Telshodhak Karkhane Ka Nirmann Kis PanchVarshiya Yojana Kaal Me Hua ? Bihar Gk in hindi, Udyog Dvitiya question answers in hindi pdf Third questions in hindi, Know About Pratham Bihar Gk online test Bihar Gk notes in hindi quiz book Chaturth
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