The magnitude of magnetic induction at mid-point $O$ due to current arrangement as shown in Fig will be
  • A$\frac{\mu_0 I}{2 \pi a }$
  • B$0$
  • C$\frac{\mu_0 I }{4 \pi a }$
  • D$\frac{\mu_0 I}{\pi a }$
JEE MAIN 2023, Medium
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