This book is written by ER R.K ojha (Raunak ojha), Ayush aryan .He done his engineering in electronics and communication. He is from khabra muzaffarpur bihar . He is only written this book for students who is unable to read 12th and only wants to pass the examination by good marks and this book definitely help them. If this book get success in market then later on he will write maths and physics also because he do not want that every student face same problem that he was facing in his intermediate exam. By the help of this book students do not have to take tuition and only by the self study students will pass the examination by flying colours.