Answer:
None of them
Explanation:
A polynomial must have a pronumeral that is to the power of an integer, and you can't divide by a variable such as 2/x so for
a) there is a
which means it's not a polynomial as
is the same as
![x^(1/2)](https://img.qammunity.org/2021/formulas/mathematics/middle-school/l52jl2xb517j1amlksnht4ihkhzkl9cpss.png)
b) The second term is being divided with a variable so that can't be a polynomial
c) There is a
so it can't be a polynomial
d) There is a
so it can't be a polynomial