If the vectors AB = -3i + 4k and AC = 5i...

If the vectors AB = -3i + 4k and AC = 5i - 2j + 4k are the sides of a triangle ABC, then the length of the median through A is

A

`sqrt14`

B

`sqrt18`

C

`sqrt25`

D

`sqrt29`

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The correct Answer is:

B

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