<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 68-year-old man comes to the physician 3 months after noticing skin changes on his scalp. When he scrapes off the crust of the lesion, it reappears after a few days. Occasionally, his scalp itches or he notices a burning sensation. He had a mole removed on his right forearm 5 years ago. He is a retired winemaker. His vital signs are within normal limits. Examination shows multiple rough patches on his scalp. A photograph is shown. Which of the following is the most likely diagnosis?? A: Seborrheic keratosis, B: Keratoacanthoma, C: Actinic keratosis, D: Bowen disease, E: Amelanotic melanoma,  <response>: This is a clinical case question asking to diagnose a skin condition in a 68-year-old man based on his history and physical exam findings. The key details are the rough patches on his scalp that crust over and reappear after scraping, along with itching and burning sensations. His history of sun exposure as a winemaker and prior mole removal are also relevant. The differential diagnosis includes pre-cancerous and cancerous skin conditions that can present with scaly, crusting lesions on sun-exposed areas like the scalp in older individuals. C: Actinic keratosis 