This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Skin lesions and disorders of pigmentation, Subject name: Dental
A female has hypopigmented lesion on centre of forehead. Drug responsible is ? 
Select and explain. 
A. Hydroquinone, B. Ether metabolite of hydroquinone, C. Para teiary butyl catechol, D. Para teiary butylphenol
D: Para teiary butylphenol
Answer: D: Para teiary butylphenol 
Explanation: Hypo or amelanotic lesions simulating vitiligo can be caused by various chemicals at the site of contact. eg: parateiary butylphenol paraphenylenediamine-hairdye monobenzylether of hydroquinone derivative of hydroquinone present in skin lightening creams coicosteroids rubber-gloves,aprons,tape,slippers monobenzyl ether of hydroquinone-leather IADVL textbook of dermatology , pigmentary disorders 745