Which of the following expressions is indeterminate?
(f(x, y, z) – h(x, y, z))/(g(x, y, z) – j(x, y, z))
(f(x, y, z) + h(x, y, z) + g(x, y, z) + j(x, y, z))/(j(x, y, z) + h(x, y, z) – m(x, y, z) – n(x, y, z))
(g(x, y, z) – j(x, y, z))/(f(x, y, z) – h(x, y, z))
(h(x, y, z) – f(x, y, z))/(n(x, y, z) – g(x, y, z))