How much percent of the abrasives are recommended in general for abras

1.	How much percent of the abrasives are recommended in general for abrasive medium?
A.	10 ‚Äö√Ñ√∂‚àö√ë‚àö¬® 15 %
B.	15 ‚Äö√Ñ√∂‚àö√ë‚àö¬® 20 %
C.	25 ‚Äö√Ñ√∂‚àö√ë‚àö¬® 30 %
D.	30 ‚Äö√Ñ√∂‚àö√ë‚àö¬® 35 %
Answer» E.

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