अंग्रेजों ने छोटानागपुर में शांति की स्थापना हेतु जमींदारी पुलिस बल का गठन किस वर्ष किया ? - In which year did the British set up Zamindari Police Force to establish peace in Chotanagpur? - Angrejon ne ChhotaNagpur Me Shanti Ki Sthapanaa Hetu Jameendari Police Bal Ka Gathan Kis Varsh Kiya ? Jharkhand Gk in hindi, इतिहास 1779ई. question answers in hindi pdf 1801Ee. questions in hindi, Know About 1809 Ee. Jharkhand Gk online test Jharkhand Gk notes in hindi quiz book 1805Ee.