The correct answer is D. Trichoblastoma.

Nevus sebaceous is a benign hamartoma often seen on the scalp and face. Trichoblastoma is the most common secondary neoplasm identified within nevus sebaceous.

Basal cell carcinoma, Trichilemmoma, and poroma may be seen within a nevus sebaceous, however they do not occur as frequently as a trichoblastoma.

Melanoma and squamous cell carcinoma are less likely to be associated with a nevus sebaceous.

 

References: Jaqueti G, Requena L, Sánchez Yus E. Trichoblastoma is the most common neoplasm developed in nevus sebaceus of Jadassohn: a clinicopathologic study of a series of 155 cases. Am J Dermatopathol. 2000 Apr;22(2):108-18. doi: 10.1097/00000372-200004000-00004. PMID: 10770429.

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