बिहार राज्य हाइड्रोइलेक्ट्रिक पॉवर कॉर्पोरेशन की स्थापना कब हुई थी ? - When was the Bihar State Hydroelectric Power Corporation established? - Bihar Rajya hydroelectric Power Corporation Ki Sthapanaa Kab Hui Thi ? Bihar Gk in hindi, Government Schemes 1962 Me question answers in hindi pdf 1975 Me questions in hindi, Know About 1982 Me Bihar Gk online test Bihar Gk notes in hindi quiz book , 1978 Me