AWS-CWI part B question

Q:- What F – number(s) apply to the proper filler metal for this qualification?

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A. 1 and 6
B. 2 and 6
C. 1 and 4
D. 4 only
E. 1 only

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Q:-In accordance with BS 2901 which of the following is classified as triple De-oxidized filler wire:

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(a) A !7 wire.  
 
(b) A 18 wire.  
 
(c) A 15 wire.  
 
(d) All of the above.