बिहार के अधिकांश जिले किस भूकम्प जोन में आते हैं ? - In which earthquake zone most of the districts of Bihar fall? - Bihar Ke Adhikansh Jile Kis Bhukamp Zone Me Aate Hain ? Bihar Gk in hindi, Canals and Irrigation II question answers in hindi pdf iii questions in hindi, Know About I Bihar Gk online test Bihar Gk notes in hindi quiz book iv