To figure this out, we just need to simplify as much as we can for each problem, and then find a common denominator.
A
4/6 = 9/12
2/3 = 3/4
this is false
B
4/6 < 9/12
2/3 < 3/4
8/12 < 9/12
this is true, but let's look at the others just in case
C
4/6 > 10/12
2/3 > 5/6
4/6 > 5/6
this is false
D
It looks like C and D are the same. This means D is also false.
So B is the only true statement
Answer: B