This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Contraception, Subject name: Gynaecology & Obstetrics
[{'content': 'Which of the following is not a surgical method for tubal ligation ? \nSelect and explain. \nA. Pomeroy, B. Parkland, C. Essure, D. Irving', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Various methods are Pomeroy method, Parkland procedure, madlener procedure, Irwing, Uchida, Aldridge, Shirodkar etc. THE TEXTBOOK OF GYNAECOLOGY SHEILA BALAKRISHNAN SECOND EDITION PAGE NO 388', 'role': 'assistant'}]