Study the given bar graph and answer the question that follows.
The bar graph shows the exports of cars of type A and B (in ₹ millions) from 2014 to 2018.

In which year were the exports of cars of type B ₹20 million less than the average exports (per year) of cars of type A over the five years?

A

2014

B

2015

C

2016

D

2017