Maximum malignant potential is in –
Amongst the given options only junctional naevus has malignant potential.
Following melanocytic naevi can transform in to malignant malenoma

Malignant potential is maximum → congenital melanocytic naevus, and dysplastic (atypical) naevus.
Malignant potential is less (but present) → Junctional and compound nevus.
Superficial naevus
Epidermal naevus
Junctional naevus
Intradermis naevus