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: Pathology
Exfoliative cytology is indicated in 
Select and explain. 
A. Heavily keratinized lesions of oral cavity, B. Pre-cancerous lesions of oral cavity, C. Cigarette smokers, D. Mass screening of cervical cancer
D: Mass screening of cervical cancer
Answer: D: Mass screening of cervical cancer 
Explanation: None