Which of the following is a proportion?
9/12=8/10
3/4=9/12
6/8=8/12
12/18=9/16

The second option, 3/4 = 9/12 is a proportion.
Hope this helped! :D
Answer:
B
Step-by-step explanation:
To find the correct proportion you simplify all fractions into their simpliest form. If you do this you'll find that only B has two equivalent fractions