This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Microbiology
True statement regarding base excision repair is 
Select and explain. 
A. Used only for the bases which are deaminated, B. Uses enzyme called as DNA glycosylase which generates a basic sugar site, C. Removes about 10 - 15 nucleotide, D. Recognizes a bulk lesion
B: Uses enzyme called as DNA glycosylase which generates a basic sugar site
Answer: B: Uses enzyme called as DNA glycosylase which generates a basic sugar site 
Explanation: This is the first step of base excision repair. Bases modified by deamination, methylation, or by other chemical modification are removed by this kind of repair system.