This book is very important for those who are preparing for various competitive exams like mostly like Northeastern states Public Service Commission, Railway, Agricultural exam, Court, Clark, and many more various departmental examinations. It covers all the topics which are important according to the exam format and new examination pattern. This book is made according to syllabus and maintain the sequence of the syllabus, for that every student will be able to understand clearly. Previous years question paper is also included at the last of the States, and also attached the examination point of view questions which are mostly expected to come in the examination. Simple language, mostly table format, which are very preferable to memorized. I hope one who is reading this book will be able to understand and become successful. BEST WISHES TO ALL THANK YOU