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If the position vectors of the vertices of `DeltaABC" ""are" " "3hat(i)+4hat(j)-hat(k),hat(i)+3hat(j)+hat(k)and5(hat(i)+hat(j)+hat(k))`, respectively. Then, the magnitude of the altitude from A onto the side BC is

A

`(4)/(3) sqrt5`

B

`(5)/(3)sqrt5`

C

`(7)/(3)sqrt5`

D

`(8)/(3) sqrt5`

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