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: Social & Preventive Medicine
Decreased teeth enamel is seen in all except: 
Select and explain. 
A. Hyperparathyroidism, B. Cushing syndrome, C. Fluorosis, D. Ostcomalacia
C: Fluorosis
Answer: C: Fluorosis 
Explanation: Ans. Fluorosis