Warty growth on the scalp!

50 y white man, with no PMH, presents to the office with a growth on the scalp for several years. On exam, the patient has a 2 cm filiform eruption on the scalp. What is the most likely clinical diagnosis?

1. Verruca vulgaris- answer
2. Squamous cell carcinoma
3. Basal cell carcinoma
4. Actinic keratosis
5. Keratoacanthoma