Which pair of fraction is proportional?

A) 0.4/0.1 =? 6/1.5

B) 0.4/0.1 =? 6/1.6

C) 0.4/0.1 =? 5.6/1.5

D) 0.4/0.1 =? 5.6/1.6

No examples were provided. The question is also vague. ANY pair of fractions is proportional.