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DIRECTIONS: On the basis of following diagram / picture answer the questions given below: In the circuit below, which switch should be left open and which switch should be left closed so that only bulb Y lights up? Switch A Switch B Switch C Switch D

A. Closed Closed Open Open
B. Closed Open Open Closed
C. Open Open Closed Closed
D. Open Closed Closed Open
Answer» D. Open Closed Closed Open


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