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: Dental
A probable etiology of gingivosis is? 
Select and explain. 
A. High progesterone levels, B. Deficiency of estrogen and testosterone, C. Pregnancy, D. Aldosterone deficiency
B: Deficiency of estrogen and testosterone
Answer: B: Deficiency of estrogen and testosterone 
Explanation: None