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Two long parallel wires P and Q are both...

Two long parallel wires `P` and `Q` are both perpendicular to the plane of the paper with distance `5m` between them. If `P` and `Q` carry current of `2.5` amp and `5` amp respectively in the same direction, then the magnetic field at a point half way between the wires is

A

`mu_(0)//17`

B

`sqrt(3)mu_(0)//2pi`

C

`mu_(0)//2pi`

D

`3mu_(0)//2pi`

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