<prompt> 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?Dengue feverChikungunyaFixed drug eruptionMelasma  <response>: 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 