Which of the following materials are used in Grinding wheel? 1. Aluminum oxide 2. Cubic boron nitride 3. Silicon carbide. Select the correct answer using the codes given below: Codes:

Which of the following materials are used in Grinding wheel? 1. Alumin

1.	Which of the following materials are used in Grinding wheel? 1. Aluminum oxide 2. Cubic boron nitride 3. Silicon carbide. Select the correct answer using the codes given below: Codes:
A.	1, 2 and 3
B.	1 and 2
C.	2 and 3
D.	1 and 3.
Answer» B. 1 and 2

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Which of the following materials are used in Grinding wheel? 1. Aluminum oxide 2. Cubic boron nitride 3. Silicon carbide. Select the correct answer using the codes given below: Codes:

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