Which ratios form a proportion?

Question

(a)4/9, 12/25
(b)3/7, 18/42
(c)5/8, 15/25
(d)5/11,20/45
I think the answer is B. am I correct?

Answer 1

Yes, B.

Answer 2

thank you so much

Answer 3

Can you help me with my other question? @Ms. Sue

Answer 4

You're welcome.