जीवाश्म वृक्ष (लगभग 20 लाख वर्ष पुराना) किस संग्रहालय में रखा गया है ? - The fossil tree (about 20 lakh years old) is kept in which museum? - Jiwashma Vriksh (Lagbhag 20 Lakh Year Purana) Kis Sangrahalay Me Rakha Gaya Hai ? Bihar Gk in hindi, Historical Aspects Gaya Sangrahalay Gaya question answers in hindi pdf Puratatvik Sangrahalay , Vaishali questions in hindi, Know About Patana Sangrahalay Patana Bihar Gk online test Bihar Gk notes in hindi quiz book ChandraDhari Sangrahalay , Darbhanga