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If z1 and z2 are two complex no. st abs...

If `z_1` and `z_2` are two complex no. st `abs(z_1+z_2)` =`abs(z_1)+abs(z_2)` then

A

`arg(z_1)=arg(z_2)`

B

`arg(z_1)+arg(z_2)=0`

C

`arg(z_1z_2)=0`

D

none of these

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The correct Answer is:
A
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