In the given circuit,what happens when the switch $S$ is opened?

  • A
    Bulbs $B_1$ and $B_2$ turn off immediately.
  • B
    Bulbs $B_1$ and $B_2$ turn off after some time.
  • C
    Bulb $B_1$ turns off immediately,while bulb $B_2$ turns off after some time.
  • D
    Bulb $B_2$ turns off immediately,while bulb $B_1$ turns off after some time.

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