The solution of the differential equation dy/dx = y² * x * ln(x² * xy), where c is the constant of integration:
a) y = -1/(x² * ln(x² * xy) + c)
b) y = 1/(x² * ln(x² * xy) - c)
c) y = e(x² * ln(x² * xy) + c)
d) y = e(-x² * ln(x² * xy) - c)