This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nucleotides, Subject name: Biochemistry
Deamination of 'methylated cytosine' will produce: 
Select and explain. 
A. Thymine, B. Adenine, C. Xanthine, D. Guanine
A: Thymine
Answer: A: Thymine 
Explanation: Spontaneous deamination of Cytosine produces Uracil. Thymine is 5-Methyl Uracil. So, deamination of methylated Cytosine will produce Thymine.