A number for each figures are given from 1 to 9 . Find out the best method of classification and identify this among st the four alternatives.



(1, 3 ,5 ) , ( 2 ,6 , 9), ( 4 , 7, 8)
(2 , 3 , 4),( 5, 6 , 8),( 9, 1 ,7)
(1 , 3, 5 ), ( 2 ,6 , 8), ( 4, 7, 9)
( 3, 2 , 4) ,(6 , 5 , 8) , ( 7 , 9 ,1)

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