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If the two lines l(1):(x-2)/(3)=(y+1)/(-...

If the two lines `l_(1):(x-2)/(3)=(y+1)/(-2),z=2andl_(2):(x-1)/(1)=(2y+3)/(alpha)=(z+5)/(2)` are perpendicular, then an angle between the lines `l_(2) and l_(3) : (1-x)/(3)=(2y-1)/(-4)=(z)/(4)` is :

A

`cos^(-1)((29)/(4))`

B

`sec^(-1)((29)/(4))`

C

`cos^(-1)((2)/(29))`

D

`cos^(-1)((2)/(sqrt(29)))`

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