This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autoimmune Skin Disorders, Subject name: Skin
A 35-year-old man developed a brown pigmentation on the face after taking nonsteroidal anti-inflammatory drug (NSAID) for fever, joint pain and malaise. What is the diagnosis? 
Select and explain. 
A. Dengue fever, B. Chikungunya, C. Fixed drug eruption, D. Melasma
C: Fixed drug eruption
Answer: C: Fixed drug eruption 
Explanation: ANS. C* The image shows a hyperpigmented lesion, and with the history of drug intake, the diagnosis is fixed drug eruption.Close differentials of hyperpigmented lesions in faceMelasma (brown pigmentation in face)