Study the given bar graph and answer the question that follows.
The bar graph shows the exports of cars of types A and B (in ₹ million).

What is the ratio of the total exports of cars of type A in 2016 and 2018 to the total exports of cars of type B in 2015 and 2017?

A

23:21

B

15:29

C

18:23

D

21:23