One of the following statements is false Select one: a. If f is an analytic function such that If| is a constant function then f is analytic. b. If v is a harmonic conjugate of u, then-u is a harmonic conjugate of v. * O If f and f are both analytic then f is a constant. d. If v is a harmonic conjugate of u and if u is a harmonic conjugate of v then both u and v are equal.