In this task, you are given a question and answer options for that question. Using this information, you have to classify each text into different topics: medicine, nursery, psychology, chemistry, pharmacology, biology.

Question: Question linked to image n ° 16 Patient of 84 years who presents an ulcerated tumor lesion that shows in the scalp of more than 20 years of evolution. No palpable locoregional adenopathies. Obviously the lesion must be biopsied for diagnostic confirmation but, a priori, which of the following diagnoses seems most likely? 
 Options:  <0> Merkel cell tumor. <1> Basal cell carcinoma. <2> Squamous carcinoma <3> Amelanotic malignant melanoma. <4> Cutaneous B-cell lymphoma
medicine