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Three identical lamps A, B and C and two identical inductive coils $L_{1} {and L}_{2}$ are connected to a DC power supply through a switch S as shown in the figure. Initially the switch is closed for a long time and steady state is reached. Now the switch S is opened. Which of the following statements correctly describes order of brightness of the bulbs immediately after the switch is opened?

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Brightness of C suddenly increases but that of A and B remains unchanged.

Brightness of all bulbs suddenly increases equally.

Brightness of B suddenly increases but that of A and C remains unchanged.

Brightness of A suddenly increases but that of B and C remains unchanged.

answer is A.

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