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If z1 and z2 are two complex numbers su...

If `z_1 and z_2 ` are two complex numbers such that `|(barz_1-2barz_2)(2-z_1barz_2)|=1` then (A) `|z_1|=1, if |z_2|!=1` (B) `|z_1|=2, if |z_2|!=1` (C) `|z_2|=2, if |z_1|!=1` (D) `|z_2|=1, if |z_1|!=2`

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