Let p(x) = x + 2a + x + xo be a Poincare' 0. Map for a certain differential equation x'(t) = f(t, x), where f(t, x) is a periodic function in t variable with period T. The this %3D differential equation admits a periodic solution if the initial condition(s) is/are xo = -1 %3D xo = 0, xo = 1 O and xo = -1 None