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: Pathology
Methylation of cytosine resiclues results in ? 
Select and explain. 
A. Point mutation, B. Decreased expression of gene, C. Increased expression of gene, D. Aneuploidy
B: Decreased expression of gene
Answer: B: Decreased expression of gene 
Explanation: Methylation makes the DNA mute.