The book has been updated as per last ten years questions papers of B.B.A., M.D. University, Rohtak. Practical questions given at the end of each chapter are strictly in the serial order of the illustrations. Answers and hints to solve the questions have been given at the end of each question. We are very much confident that after doing the illustrations, students can themselves solve the practical questions independently. The book contains a large number of practical questions at the end of each chapter, so that students may test their understanding of the chapter. Accuracy is one of the main features of the book.

Suggestions for improvement in the book will be thankfully received and acknowledged.