question_answer

                                 Group the given figures into three classes on the basis of their identical properties by using each figure only once.    (SOF IMO 2017)      

A) 1,6,7:2,4,9:3,5,8                                               

B) 1, 5,7; 2, 3,4; 6,8,9              

C) 1, 6, 7:2, 3, 5:4, 8, 9                                         

D) 1, 5, 8; 2, 4, 7; 3, 6, 9