This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of nucleic acids, Subject name: Biochemistry
Xeroderma pigmentation is caused due to a group of closely related abnormalities in 
Select and explain. 
A. Mismatch repair, B. Base excision repair, C. Nucleotide excision rapair, D. SOS repair
C: Nucleotide excision rapair
Answer: C: Nucleotide excision rapair 
Explanation: Autosomal recessive conditionThere are seven xeroderma pigmentosum genes necessary for NER mechanism in humans Mutation in any of them lead to the condition XPRef: DM VASUDEVAN 7th edition, page no: 584