The correct option is C 4(x+4y)
Concept–––––––––:
If an expression is of the form abx+acy, then we can take out 'a' as a common factor and the expression can be rewritten as a(bx+cy).
Method–––––––––:
We are having 4x+16y as the expression.
Taking 4 out as a common factor, we get
4(x+4y) as the required expression.