The term with degree 4 is [tex]5 x^{4} [/tex].
The coefficient of the term is the constant number that is being multiplied with the variable of the term. In case of [tex]5 x^{4} [/tex], the variable is x raised to the power 4 and the constant term that is being multiplied to the variable is 5.
So the coefficient of of term of degree 4 is 5.
Thus correct answer is option D