Answer :

As we know that,

A polynomial is an expression having variables and coefficients, that involves only the operations of addition, subtraction, multiplication, and non-negative integer exponents of variables


Out of the 4 given options, we have:


and are not polynomials as they have negative exponent.


is not a polynomial as it has non integral exponent.


And -4 can be written as -4x0, thus it is a polynomial with integer power.


Thus, -4 is the correct option.

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