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Find the odd one out and give the reasons. (a) Cellular phone (b) Laptop (c) Digital Camera (d) Electronic watch

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Find the odd one out and give the reasons.

(a) Cellular phone 

(b) Laptop 

(c) Digital Camera 

(d) Electronic watch

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1 Answer

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(d) Electronic watch. in this mercury button cell is used whereas in others Li-ion battery is used up.

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