Try this:
i = 1:size(C,1);
D = C(any(i>=A & i<=B),1);
Works with the following simple arrays, but let me know if it doesn't work for you.
C = randi(10,20,2);
A = [2;5;10];
B = [3;8;15];
i = 1:size(C,1);
D = C(any(i>=A & i<=B),1);
Results:
>> C
C =
7 6
10 8
3 6
10 5
4 10
6 2
7 2
5 7
2 9
7 4
8 5
6 3
7 3
4 6
6 9
9 5
10 6
3 7
6 8
5 6
>> D
D =
10
3
4
6
7
5
7
8
6
7
4
6
