The bar-diagram given below shows the realization from exports of Product "AB", in $ (Million) during different years from Year 1 to Year 7:-

What is the ratio of the absolute difference in exports in the year 3 & year 7 and year 2 & year 6?

A

$$2 : 5$$

B

$$1 : 4$$

C

$$3 : 1$$

D

$$5 : 3$$