If the two diagonals of one its faces ...

If the two diagonals of one its faces are `6 hat i+6 hat ka n d4 hat j+2 hat k` and of the edges not containing the given diagonals is `c=4 hat j-8 hat k ,` then the volume of a parallelepiped is a. `60` b. `80` c. `100` d. `120`

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