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
Which of the following test detects presence of glycogen in superficial cells of vaginal epithelium 
Select and explain. 
A. Pap smear, B. Schiller Test, C. Benzidine Test, D. Seliwanoff's Test
B: Schiller Test
Answer: B: Schiller Test 
Explanation: Schiller Test: Vaginal wall is stained with Lugol's iodine. In presence of glycogen, vaginal epithelium takes mahogany brown colour.