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
Greenish vaginal discharge with severe Itching points to a diagnosis of : 
Select and explain. 
A. Senile vaginitis, B. Candidiasis, C. Trichomoniasis, D. Pyogenic vaginitis
C: Trichomoniasis
Answer: C: Trichomoniasis 
Explanation: Trichomoniasis