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The system of two rods shown in figure i...

The system of two rods shown in figure is vibrating at the same frequency and forming a standing wave. The ratio of the number of antinodes in the two rods if radius of rod `B` is twice radius of `A` and the material and the lengths of the two rods is same : (A)2:1 (B)3:1 (C)2:3 (D)4:1

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