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Identify the correct statement regarding entropy:

1.	At absolute zero of temperature, the entropy of all crystalline substances is taken to be zero.
2.	At absolute zero of temperature, the entropy of a perfectly crystalline substance is positive.
3.	At absolute zero of temperature, the entropy of a perfectly crystalline substance is taken to be zero.
4.	At 0 °C , the entropy of a perfectly crystalline substance is taken to be zero.

Subtopic: 2nd & 3rd Law of Thermodynamics |

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AIPMT - 1998

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