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QUESTION Which of the following sets are bounded?

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\item[(a)]
 $|z-2+i|\leq 1.$

\item[(b)]
 $|2z+3|>4.$

\item[(c)]
 Im$z>3$
\item[(d)]
 $|z-4|\geq|z|$

\item[(e)]
 $0\leq\textrm{Arg} z\leq \frac{\pi}{4},\ (z\neq0.)$

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ANSWER (a)

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