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Given veca + vecb +vecc=0. Out of these ...

Given `veca + vecb +vecc=0`. Out of these vectors `veca`, `vecb` and `vecc` two vectors are equal in magnitude. The magnitude of the third vector is `sqrt2` times that of either of the two having equal magnitude. The angles between the vectors are:

A

`90^@, 135^@, 135^@`

B

`30^@, 60^@, 90^@`

C

`45^@, 45^@, 90^@`

D

`45^@, 60^@, 90^@`

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