In the figure (i), (ii) & (iii) shown th...

In the figure (i), (ii) & (iii) shown the objects A, B & C are of same mass. String, spring & pulley are massless. C strikes B with velocity ‘u’ in each case and sticks to it. The ratio of velocity of B in case (i) to (ii) to (iii) is

`1 : 1 : 1`

`3 : 3 : 2`

`3 : 2 : 2`

none of these

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