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Which of the following defect is a thermodynamically stable defect?

Which of the following defect is a thermodynamically stable defect? Correct Answer Vacancy

A vacancy or vacant lattice site exists when an atom is missing from a normal lattice position. In pure metals, small numbers of vacancies are created by thermal excitation, and these are thermodynamically stable at temperatures higher than absolute zero. Rest of the defects are not the equilibrium defects.

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