This is the thoroughly revised and updated edition of the popular textbook. The book retains its simplicity, lucidity and clarity of writing?the hallmark features of this title, well appreciated by the medical students as well as the teachers. The textbook covers all the topics as per the latest NMC Guidelines | Competency Based Medical Education (CBME) Curriculum under Graduate Medical Education Regulation. Besides being the 'must read' for undergraduate medical students, the text also caters to the needs of the candidates preparing for postgraduate entrance and other competitive examinations.