Consider the following statements.
A. Heat flows from an object at higher temperature to an object at lower temperature;
B. Heat flows from an object with higher thermal energy to one with lower thermal energy
C. Heat flows from an object in liquid state to an object in solid state.
Which statements are true?
1. B only
2. A only
3. A and C only
4. A and B only
5. None is true.
6. B and C only
7. All are true.
8. C only
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