The correct answer is A. Ectodermal dysplasias.

Ectodermal dysplasias. The picture demonstrates incontinentia pigmenti. Both ectodermal dysplasias (e.g. hypohidrotic ED) and incontinentia pigmenti have pegged teeth.

Pachyonychia congenita type 2 has natal teeth. ¹

Retention of primary teeth can be seen in Hyper-IgE syndrome. ¹

Gardner syndrome has supernumerary teeth (polydontia). ¹

Sjogren-Larsson syndrome, tuberous sclerosis, and junctional epidermolysis bullosa has enamel hypoplasia (including enamel pits). ¹

Papillon-Lefevre and Haim-Munk syndrome have periodontitis with early tooth loss. ¹

Letterer-Siwe syndrome has floating teeth. ¹

Congenital erythropoietic porphyria has red-colored teeth (erythrodontia). ¹

References:

1. Jain S. Dermatology – Illustrated Study Guide and Comprehensive Board Review. Springer International Publish; 2017.