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: Pathology
Yellow, brown or black pigment which show fluorescences under UV light 
Select and explain. 
A. Tetracycline, B. Internal resorption, C. Fluorosis, D. None of the above
A: Tetracycline
Answer: A: Tetracycline 
Explanation: None