Theoretical aspect of the subject has been written in a very simple language Main contents of the chapter are highlighted so that brush-up can be done quickly before the exam Units are divided into different numbers of chapters, according to the topic to synchronise the entire syllabus and help students correlate the topics Question bank of approx. 4000 MCQs are provided, which cover both conceptual issues and their practical applications that enable the student to pierce the topic and understand its depth