Question

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Tick (✓) the odd-one out giving reason :
1. Glass rod, Cotton cloth, Positive charge on glass rod, Silk cloth
2. Lightning, Lightning conductor, Electroscope,
3. Earthquake, Tsunami, Richter scale, Epicentre, Focal depth
4. Hypocentre, Volcanic eruption, Earthquake, Seismic waves.
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Answer 1

HERE'S the answer

Its ...

A

OPTION

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