Which of the following crystallographic defects contribute to electron

1.	Which of the following crystallographic defects contribute to electronic defects?
A.	1, 2 and 3
B.	2, 3 and 4
C.	1, 3 and 4
D.	1, 2 and 4
Answer» C. 1, 3 and 4

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Which of the following crystallographic defects contribute to electronic defects?

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