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# If the point represented by the complex number $iz$ is rotated about the origin through the angle $\large\frac{\pi}{2}$ in the counter clockwise direction then the complex number representing the new position is

$\begin{array}{1 1}(1)iz&(2)-iz\\(3)-z&(4)z\end{array}$

The complex number iz is rotated about the origin through a angle $\large\frac{\pi}{2}$ i the counter clock wise direction then the complex number representing the new position is $i(iz)=-z$
Hence 3 is the correct answer.