बिहार राज्य विद्युत् बोर्ड राज्य में बिजली की आपूर्ति कितने क्षेत्रीय बोर्डों के माध्यम से करता है ? - Bihar State Electricity Board supplies electricity in the state through how many regional boards? - Bihar Rajya Vidyut Board Rajya Me Bijli Ki Aapurti Kitne Kshetriya Boards Ke Madhyam Se Karta Hai ? Bihar Gk in hindi, Government Schemes 8 question answers in hindi pdf 9 questions in hindi, Know About 7 Bihar Gk online test Bihar Gk notes in hindi quiz book 5