Let $A = \{ z \in C:1 \le |z - (1 + i)| \le 2\} $ and $B = \{ z \in A:|z - (1 - i)| = 1\} $. Then, B :

Question

Let $A = \{ z \in C:1 \le |z - (1 + i)| \le 2\} $

and $B = \{ z \in A:|z - (1 - i)| = 1\} $. Then, B :

is an empty set

contains exactly two elements

contains exactly three elements

is an infinite set

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