This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
What is the content of ethinyl estradiol in very low dose oral contraceptives ? 
Select and explain. 
A. 30 pig, B. 25 ps, C. 20ug, D. 151.tg
C: 20ug
Answer: C: 20ug 
Explanation: Ans. is 'c' i.e., 20 jutg o Very low dose OCPs ---> 20 mg ethinyl estradiol. o Conventional OCPs --> 30-50 mg ethinyl estradiol (mostly 30 g)