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': 'Mala-N oral contraceptive pill differs from Mala-D, in terms of:- \nSelect and explain. \nA. Norgestrol dosage, B. Oestradiol dosage, C. Sold under social marketing scheme, D. Supplied free of cost', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Mala-N Mala-D Type of contraceptive Combined OCP Combined OCP Estrogen Ethinyl estradiol Ethinyl estradiol Progesterone Norgestrel Desogestrel Status in RCH Provide free of cost Provided at a subsidized cost (Rs. 3/ per packet)', 'role': 'assistant'}]