Group the given figures into three classes using each figure only once.

A. 1,3,9; 2,5,6; 4,7,8 B. 1,3,9; 2,7,8; 4,5,6 C. 1,2,4; 3,5,7; 6,8,9 D. 1,3,6; 2,4,8; 5,7,9

A. 1,2,6; 3,4,7; 5 B. 1,3; 2,6; 4,5,7 C. 1,2,6,7; 3; 4,5 D. 1,3; 2,4,5; 6,7

A. 2,4,7; 1,8,9; 3,5,6 B. 2,6,9; 1,5,7; 3,4,8 C. 2,6,7; 1,5,8; 3,4,9 D. 2,8,7; 1,5,9; 3,4,6

A. 1,2,4; 3,5,6; 7,8,9 B. 1,7,8; 3,5,6; 2,4,9 C. 1,3,4; 2,8,9; 5,6,7 D. 1,7,8; 2,3,6; 4,5,9