This book organized and arranged as per the syllabus. Each chapter is explained with terminology which helps the student to understand the concepts easily. Also review questions are provided at the end of the chapter to exercise and recollect the learned concepts in the chapter. Previous university questions paper are provided at the end of this textbook which helps the students to understand the important questions for prepare and present in the university examinations. Each chapter explained in simple language, needed diagrams and tables helps to remember, recollect and present in examination.