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: Gynaecology & Obstetrics
Oral contraceptive pills cause all except : 
Select and explain. 
A. Dysmenorrhea, B. Mastalgia, C. Nausea, D. Chloasma
A: Dysmenorrhea
Answer: A: Dysmenorrhea 
Explanation: Ans. is a i.e. Dysmenorrhea OCP's have antiovulatory effect and by viue of this propey, relieve dysmenorrhoea (rather than causing it), Premenstrual tension and Mittleschmerz syndrome.