Final answer:
D) Lymphomatoid papulosis
Lymphomatoid papulosis is a benign skin condition with a presentation of crops of papules that can ulcerate and is characterized by CD30+ T cells, with an increased risk for developing lymphoma.
Step-by-step explanation:
The condition that presents as crops of papules that can ulcerate, with CD30+ T cells, is benign but carries an increased risk of lymphoma is lymphomatoid papulosis. This skin disorder is characterised by recurrent, self-healing eruptions of papules, some of which may ulcerate. The presence of CD30+ T cells in the lesions is a key diagnostic feature, distinguishing it from other skin conditions with similar presentations. Despite its benign nature, patients with lymphomatoid papulosis have a higher risk of developing a lymphoma, which requires careful long-term monitoring.