This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
For determination of sex, smear is taken from 
Select and explain. 
A. Buccal mucosa, B. Vagina, C. Skin, D. Nose
A: Buccal mucosa
Answer: A: Buccal mucosa 
Explanation: Buccal mucosa