Which of the following elements act as donor impurities? 1. Gold2. Phosphorus3. Boron4. Antimony5. Arsenic6. Indium Select the answer using the following codes :

• A. 1, 2 and 3
• B. 1, 2, 4, and 6
• C. 3, 4, 5 and 6
• D. 2, 4 and 5