A) 1 kg of iron having temperature of \[20{}^\circ C\]
B) 1 kg of brass having temperature of \[20{}^\circ C\]
C) 1 kg of water having temperature of \[20{}^\circ C\]
D) 1 kg of oxygen gas having temperature of \[20{}^\circ C\]
E) None of these
Correct Answer: D
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