बिहार सरकार ने कब से बिक्री करों की जगह मूल्य- वर्धित कर की व्यवस्था अपनाई है ? - Since when has the Bihar government adopted the system of value-added tax in place of sales tax? - Bihar Sarkaar ne Kab Se Bikri Karon Ki Jagah Moolya - Vardhit Kar Ki Vyavastha Apnayi Hai ? Bihar Gk in hindi, Administration January 2005 question answers in hindi pdf March 2003 questions in hindi, Know About January 2006 Bihar Gk online test Bihar Gk notes in hindi quiz book April 2005