Magnetics

Match List I with List II

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	List I (Current configuration)		List II (Magnitude of Magnetic Field at point O)
A.		I.	\({B_0} = {{{\mu _0}I} \over {4\pi r}}[\pi + 2]\)
B.		II.	\({B_0} = {{{\mu _0}} \over {4 }}{I \over r}\)
C.		III.	\({B_0} = {{{\mu _0}I} \over {2\pi r}}[\pi - 1]\)
D.		IV.	\({B_0} = {{{\mu _0}I} \over {4\pi r}}[\pi + 1]\)

Choose the correct answer from the options given below :