A 56 year old man has painful weeping rashes over the upper eyelid and forehead for the last 2 days along with ipsilateral acute punctate keratopathy. About a year back, he had chemotherapy for Non-Hodgkin's lymphoma. There is no other abnormality. Which of the following is the most likely diagnosis?: (A) Impetigo, (B) Systemic Lupus Erythematosus, (C) Herpes Zoster, (D) Pyoderma gangrenosum
Answer is C. C i.e. Herpes zoster