question_answer

Which of the following materials are used for making patterns in investment casting method?

1. Wax

2. Rubber

3. Wood

4. Plastic

Select the correct answer using the code given below:

Code:

A) Only 1 and 3                 

B) Only 2 and 3

C) Only 1, 2 and 4 

D) Only 2, 3 and 4