This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Aetiological factors, Subject name: Gynaecology & Obstetrics
[{'content': 'Most common organism causing carcinoma cervix: \nSelect and explain. \nA. HPV33, B. HPV18, C. HPVI6, D. HPV31', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ref: Dutta textbook of gynecology 5th ed pg 312Explanation:High risk HPV strains (16, 18, 31, 33 and 35) are implicated in 99% of those diagnosed with cervical cancer.There are more than 100 types of HPV. Low-risk HPV typesAbout 30 or so types can cause genital infectionsHPV 6 and HPV 11 cause genital warts.The warts are rarely associated with cervical cancers,They are considered \'low-risk" HPV High-risk HPV typesCertain HPV types are classified as "high-risk" because they lead to abnormal cell changes and can cause genital cancers: cervical cancerThe most common of the high-risk strains of HPV are types 16 and 18. which cause about 70%\' of all cervical cancers.The most common strain of high-risk HPV is (type 16).', 'role': 'assistant'}]