Three identical p-n junction diodes D 1 , D 2 and D 3 are connected across a battery as shown in the figure. If the width of the depletion regions of D 1 , D 2 and D 3 are W 1 , W 2 and W 3 , respectively, then the correct option is:

1. A. W 1>W 2>W 3
2. B. W 3=W 1>W 2
3. C. W 3>W 2>W 1
4. D. W 2>W 1=W 3

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