The stress versus strain graphs for wire...

The stress versus strain graphs for wires of two material A and B are as shown in the figure. If `Y_(A)` and `Y_(B)` are the Young's modulii of the material, then

`Y_B=2Y_A`

`Y_A=3Y_B`

`Y_B=3Y_A`

`Y_A=Y_B`

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