Two circular loop $A$ and $B$ of radii $R$ and $N R$ respectively are made from a uniform wire. Moment of inertia of $B$ about its axis is 3 times that of $A$ about its axis. The value of $N$ is
- A$[2]^{\frac{1}{3}}$
- B$[5]^{\frac{1}{3}}$
- C$[3]^{\frac{1}{3}}$
- D$[4]^{\frac{1}{3}}$
✓ Correct answer: C
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