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प्रश्न
Study the electric circuit below. Which of the following switches should be closed so that only two bulbs will light up
विकल्प
S1,S2 and S4 only
S1, S3 and S5 only
S2, S3 and S4 ony
S2, S3 and S5 only
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उत्तर
S2, S3 and S4 only
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