This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Natural Methods, Barrier Methods, IUDs, OCPs, Subject name: Social & Preventive Medicine
[{'content': 'Which of the following criterion is false regarding the effectiveness of Lactational Amenorrhea Method? \nSelect and explain. \nA. Should be exclusively breastfeeding, B. Menstruation should not have resumed, C. Effective only up to four months after delivery, D. None of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: LAM may be effective up to six months if:- she is exclusively breastfeeding and Her menses have not returned. - Contraception of choice during lactation is progesterone only pills.', 'role': 'assistant'}]