The distance of the point (1,3,-7) from ...

The distance of the point `(1,3,-7)` from the plane passing through the point `(1,-1,-1),`
having normal perpendicular to both the lines
`(x-1)/1=(y+2)/(-2)=(z-4)/3a n d(x-2)/2=(y+1)/(-1)=(z+7)/(-1)` is

A

`(10)/(sqrt(74))`

B

`(20)/(sqrt(74))`

C

`(10)/(sqrt(83))`

D

`(5)/(sqrt(83))`

Verified by Experts

The correct Answer is:

C

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