Task: Class Relation Understanding (ontology: Sciences/Biology)

Which of the following classes is one valid superclass of 'transposable element silencing by piRNA-mediated DNA methylation'?

A. 2,4-dienoyl-CoA reductase (NADPH) activity
B. transposable element silencing by heterochromatin formation
C. (1-hydroxycyclohexan-1-yl)acetyl-CoA lyase activity
D. 1-phosphatidylinositol 4-kinase activity

Answer: transposable element silencing by heterochromatin formation