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If z is a complex number such that -pi//...

If `z` is a complex number such that `-pi//2lt=a r g zlt=pi//2,`
then which of the following inequality is true?
a.`|z- z |lt=|z|(a r g z-a r g z )`
b. `|z- z |geq|z|(a r g z-a r g z )`
c.`|z- z |<(a r g z-a r g z )`
d. none of these

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