Lets check and see which ones are proportional.
A) 1/3 = 2/6 < Proportional.
4/9 doesn't equal to 1/3.
A is not correct.
B) Lets check B.
1/2 = 3/6
3/6 = 5/10
5/10 = 1/2
7/14 = 1/2
B is correct! They are proportional!
Answer:- B is the correct answer.