If z1 and z2, are two non-zero complex n...

If `z_1 and z_2,` are two non-zero complex numbers such that `|z_1+z_2|=|z_1|+|z_2|` then `arg(z_1)-arg(z_2)` is equal to

A

`pi/2`

B

`-pi`

C

0

D

`-pi/2`

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The correct Answer is:

C

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