A) Only P and Q
B) Only Q and R
C) Only R and P
D) P, Q and R
Correct Answer: B
Solution :
In circuit P\[\to \]The bulb glows as it is a complete circuit. In circuit Q\[\to \] There is no cell and so no current flows to light up the bulb. In circuit R \[\to \] The filament is broken in the bulb. So, the bulb does not light up.
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