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
White flecks yellow or brown spots on surface of teeth covering, giving papery white appearance 
Select and explain. 
A. Mottled enamel, B. Incipient caries, C. Dental stains, D. Smooth caries
A: Mottled enamel
Answer: A: Mottled enamel 
Explanation: None