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Consider the following reasons for using non-conventional machining processes:

(i) High-strength alloys          

(ii) Complex surfaces

(iii) High accuracies and surface finish

Which of the above are correct?

(a) 1 and 2 only             (b) 1 and 3 only

(c) 2 and 3 only              (d) 1,2 and 3

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