Which of the following pairs are correctly matched? 1. Lead.......... screw nutphosphor bronze. 2. Piston..........cast iron. 3. Cam..........EN-31 steel. 4. Lead screw..........wrought iron. Select the correct answer using the codes given below:

Which of the following pairs are correctly matched? 1. Lead..........

1.	Which of the following pairs are correctly matched? 1. Lead.......... screw nutphosphor bronze. 2. Piston..........cast iron. 3. Cam..........EN-31 steel. 4. Lead screw..........wrought iron. Select the correct answer using the codes given below:
A.	2, 3 and 4
B.	1, 3 and 4
C.	1, 2 and 4
D.	1, 2 and 3
Answer» C. 1, 2 and 4

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Which of the following pairs are correctly matched? 1. Lead.......... screw nutphosphor bronze. 2. Piston..........cast iron. 3. Cam..........EN-31 steel. 4. Lead screw..........wrought iron. Select the correct answer using the codes given below:

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