Wiley's Chapter-wise Assertion-Reason for AIIMS and Other Competitive Examinations About the Author Mr. Himanshu Agarwal has done his post-graduation in Biotechnology from HNB, Garhwal University, Srinagar (Uttaranchal) and has degree in education from Rajasthan University, Jaipur. He has qualified CSIR-NET (JRF), GRE, TOEFL and GATE examinations. During the course of studies, he has done projects with top scientific institutes of India like IVRI, Bareilly, TERI, New Delhi and JNU, New Delhi. He is now a famous lecturer of Biological sciences for medical entrance and has a vast teaching experience of more than 18 years. He is very honest, dedicated and passionate towards his teaching and has taught in some of the best medical coaching institutes in Kota, Delhi and Jaipur. Mr. Anand Srivastava has done his B. Tech. in Civil engineering from NIT Allahabad and M. Tech in Environmental engineering from Delhi University. He worked as an Environmental engineer in Italian MNC. His passion for teaching pulled him in the field of coaching and mentoring. He started his coaching career from Aakash Institute, Delhi and after that he taught in a number of top-notch coaching institutes across India. His skills and passion for teaching has driven him to conduct counselling and motivational sessions for engineering and medical aspirants across north India. Dr. Pravin Kumar has done post-graduation in Organic Chemistry from CCS University, Meerut (UP) and PhD in Biodegradable Polymers from IIT. He has taught in some of the best medical and Engineering coaching institutes in Meerut and Delhi. He is the founder of IITian Scholar Circle, New Delhi and he is also HOD of Chemistry in IIT Academy, New Delhi. In the last 20 years, he has guided more than 5000 students towards their academic goals and helped them to get admission in renowned institutes like IITs, AIIMS, medical schools etc.