Incorrect(s) statement among the following:
| I. | Vacancy defect results in a decrease in the density of the substance. |
| II. | Interstitial defects results in an increase in the density of the substance. |
| III. | Impurity defect has no effect on the density of the substance. |
| IV. | Frenkel defect results in an increase in the density of the substance. |
1. (I, II)
2. (II, III)
3, (III, IV)
4. (I, IV)
HINT: There is no effect on density in Frenkel defect.
