Which polynomial is a quintic binomial?
x^4 + 2x^3 − x^2 + 7x + 11
x^2 + 4x
3x^5 + 2
5x^2 − 2x + 1
x^4 + 2x^3 − x^2 + 7x + 11
x^2 + 4x
3x^5 + 2
5x^2 − 2x + 1