What is the odd limit out of each of the 3 equations

y = f (x ) y = g(x) 3A 3B 3C lim If (x)g(x)] x-1 x-1 lim [-f (x)f(x - 3)] lim f(g(x)) X-0 Don't stop the dancing! y = f (x) y = g(x) -2 4A 4B 4C lim [f (x) + g(x -5)] lim [f(x) + g(x -1)] lim If (x) + g(x)] x- -2