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The acute angle between the lines (x+4)/...

The acute angle between the lines `(x+4)/-1 = (y-2)/2 = (z-3)/2` and `x/2 = (y-1)/-2 = (z+1)/1` is

A

`cos^(-1) (4/9)`

B

`cos^(-1)(-4/9)`

C

`cos^(-1)(2/9)`

D

`cos^(-1)(8/9)`

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The correct Answer is:
A
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