This book is designed as a one-stop reference for the aspirants of West Bengal and Kolkata Police and Sub-inspector Examination. Considering the limitation of quality content available in Bengali for WBCS and other state level competitive examination, the book is developed with elaborate pedagogical features that covers all the subjects of WBCS main examination along with current affairs. Ample questions are provided after each chapter mapping against the trend of WB Police and Kolkata Police Examination. Practice Sets, provided in the book will certainly help developing conceptual clarity. \n\nThe book will also be useful for the candidates of WBPSC-Miscellaneous, Clerkship, Food Sub-Inspector and various other state level competitive examination. \n\nSalient Features:\n1. Caters to the aspirants of both Prelims and Mains of West Bengal and Kolkata Police Examination\n2. Subjective content is presented in such a way that would help to solve one-liners/MCQs\n3. Lucid language helps it to be acceptable to all kinds of readers \n4. 10 practice sets with answer keys and explanations to provide students with conceptual clarity\n5. 200 Probable questions after each chapter with answer keys, mapped against the exam trend of WB Police and Kolkata Police exams\n6. Diverse pedagogical features –charts, tables, boxes for easy understanding\n7. Previous two years’ questions for constable and SI, for more practice \n\nAbout the Author:\n\nNurul Islam is presently working as Treasurer in West Bengal Valuation Board under Municipal Affairs Department. In 2011, he graduated in Pharmacy from a premier college under MAKAUT University, Government of West Bengal. After being associated with a renowned pharmaceutical company for a brief period, he was motivated for a government job. Soon, he got success in several exams of West Bengal Government including Indian Railways.\nFor the last 8 years, he has also been associated with preparing aspirants for WBCS, WB Police and other state examinations. He has been writing regularly in newspapers and magazines related to competitive examinations for various government jobs of all India and states. He has been involved in preparing model question papers for various government service examinations that are published in the leading newspapers and periodicals of the state.