.
Which of the following are in descending order of their value ?

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