Cot tz 49 given f(2)= (z-a) z = oo is non isolated essential singularity. z = 0 is a simple pole. (a) (b) z = 0 is not a pole. z = oo is the limit point of the

Cot tZ 49 Given f(2)= (z-a) Z = oo is non isolated essential singularity. Z = 0 is a simple pole. (A) (B) Z = 0 is not a pole. Z = oo is the limit point of the simple pole. (C) (D)