Keeping all other parameters unchanged, the tool wear in

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Keeping all other parameters unchanged, the tool wear in electrical discharge machining (EDM) would be less if the tool material has

1. High thermal conductivity and high specific heat
2. High thermal conductivity and low specific heat
3. Low thermal conductivity and low specific heat
4. Low thermal conductivity and high specific heat

Correct Option: A

With the high thermal conductivity, heat dissipation rate is more.