Which of the following elements act as donor impurities? 1. Gold 2. Phosphorus 3. Boron 4. Antimony 5. Arsenic 6. Indium Select the correct answer using the codes given below:

Which of the following elements act as donor impurities? 1. Gold 2. Ph

1.	Which of the following elements act as donor impurities? 1. Gold 2. Phosphorus 3. Boron 4. Antimony 5. Arsenic 6. Indium Select the correct answer using the codes given below:
A.	1, 2 and 3
B.	1, 2, 4 and 6
C.	3, 4, 5 and 6
D.	2, 4 and 5
Answer» E.

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