This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hyper Pigmented Disorders, Subject name: Dental
Mode of inheritance of incontinentia pigmenti is: 
Select and explain. 
A. Autosomal dominant, B. Autosomal recessive, C. X linked dominant, D. X linked recessive
C: X linked dominant
Answer: C: X linked dominant 
Explanation: Incontinentia pigmenti - X-linked dominant Developmental defects of eye, teeth, CNS with cutaneous lesions. Four clinical stages - Inflammatory macules, papules, vesicle. Hyperkeratotic & verrucous lessions Grey-brown pigmentation Atrophic, hypopigmented & depimented - Initially hyperpigmented lesions ; as it progresses towards 4th stage , it becomes hypopigmented - Lesions follow the lines of blaschko. X linked dominant diseases-Vit- D resistant rickets (X linked hypophosphataemia)-Rett syndrome-Incontinentia pigmenti-Alpo syndrome-Fragile X syndrome-Goltz syndrome-X linked protoporphyria