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Let z1 and z2 be complex numbers such that z1 ≠ z2 and |z1| = |z2|.

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Let z1 and z2 be complex numbers such that z1 ≠ z2 and |z1| = |z2|. If Re(z1) > 0 and Im(z2) < 0, then (z1 + z2)/(z1 - z2) is

(A) one 

(B) real and positive 

(C) real and negative 

(D) purely imaginary

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The correct option (D) purely imaginary   

Explanation:

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