If `alpha, beta , gamma, delta` are the roots of the equation `x^4+x^2+1=0` then the equation whose roots are `alpha^2, beta^2, gamma^2, delta^2` is
A. `(x^(2) - x + 1)^(2) = 0`
B. `(x^(2) + x + 1)^(2) = 0`
C. `x^(4) - x^(2) + 1 = 0`
D. `x^(2) + x + 1 = 0`
