This app, chatna chakra gk book, is very helpful for all competitive exams and also helpful for some general study. App contain following concept in breif. App content:- 1. भारत एंव विश्व इतिहास 2. भारतीय संविधान एंव राज्यव्स्था 3. भारत एंव विश्व भूगोल 4. भारतीय अर्थव्यस्था 5. सामान्य विज्ञान 6. विज्ञान एंव प्रोद्योगिकी 7. खेलकूद 8. कंप्यूटर 9. विविध Disclaimer :- All metarials are in this app are collected from different sources like books, internet and others. we added some value to