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In a meter bridge experiment, the circuit diagram and the corresponding observation table are shown in figure. R G Resistance box Unknown resistance X K E A Sl. No. R ( Ω ) A (cm) 1. 2. 3. 4. 1000 100 10 1 60 13 1.5 1.0 Which of the reading is inconsistent ?

1. 3
2. 4
3. 2
4. 1

Correct answer: 4

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