This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
Cells cultured from patients with this disorder exhibit low activity for the nucleotide excision repair process. This autosomal recessive genetic disease includes marked sensitivity to sunlight (Ultra voilet light) with subsequent formation of multiple skin cancers and premature death, the disorder is – 
Select and explain. 
A. Acute intermittent porphyria, B. Alkaptonuria, C. Xeroderma pigmentosa, D. Ataxia - Telangiectasa
C: Xeroderma pigmentosa
Answer: C: Xeroderma pigmentosa 
Explanation: This patient has -


Defect in nucleotide excision repair 
Increased sensitivity to sunlight (photosensitivity)
Increased susceptibility to skin cancer
Premature death


All suggests the diagnosis of Xeroderma pigmentosa.